I think the normalization of the word “wifebeater” to describe a tank top really shows that people aren’t actually critically thinking about “inclusive” language that actually matters.
I’ve heard it so casually spewed out of people’s mouths of both sexes without any sort of awareness. My parents are foreign so I was taught to call a shirt with thin straps/no sleeves a tank top. I did a double take the first time my classmate said they purchased a new “wifebeater” and asked them what they were even speaking about.
I get the association with men wearing tank tops under their work uniforms and brutally abusing their wives after work, but WHY is this term still normalized? You’re telling me I’m going to hear someone say that they saw a ciswoman chest feeding their baby in a wifebeater? What is logic?
When I was growing up in the US in the 1960s, a "wifebeater" was a pejorative term that meant only one particular kind of tank top: a man's tight-fitting undershirt (meant to be worn under other clothes) made of thin cotton knit cloth, usually white and ribbed, with narrow straps, deep armholes, and a low-cut neckline. Like the kind Marlon Brando wore in famous publicity photos for "A Streetcar Named Desire" and Paul Newman wore in the films "Harper" and "Hud."
Moreover, when I was growing up, the term "wifebeater" was only used in the US when these shirts were worn by particular kinds of men - mainly uncouth, rough, coarse, badly-behaved working class men who did manual labor and were only of certain ethniticies. Slur terms I recall from my childhood were "guinea T" and "dago tee."
Martin Scorscese made use of the association of this garment with misogynistic Italian working-class men to good effect in "Raging Bull" by having Robert DeNiro wear a "wifebeater" a number of scenes. For those who don't know, "Raging Bull" is about famed professional boxer Jake LaMotta, who unfortunately was a working-class man of Italian heritage who was a real wife beater. https://youtu.be/cFgAORdRUf4
By contrast, where I grew up, the polite and non-pejorative names for these kinds of men's undershirts worn by men generally were: men's summer undershirts, men's warm-weather undershirts, men's vests, string shirts, string vests, GI undershirts, army-style undershirts - the latter two names coz these types of undershirts,were standard issue for US army soldiers in WW2.
Army undershirts came either in bright white like the ones negatively stereotyped as"wifebeaters," or - more commonly - in the various shades of green tinged with yellows and grays worn by militaries worldwide known as "army green," "military green," "fatigue green" and, in the US, "olive drab" or the letters "OD." (Calling them O-D went out of fashion with the rise in street drug use and overdoses.)
By contrast, in the US when I grew up and for most of my adult life, the term tank top - or just plain tank, which in my personal experience is the more commonly used term for them - has always meant sleeveless tops made for and bought by either sex that were intended to be worn as outerwear or mainly as outerwear. Tanks also differed from men's warm-weather undershirts and army-style undershirts in that they could have a relaxed loose fit or even a baggy fit just as much as a tight fit; they could be made of fabrics of all sorts of weights and colors; and they could vary considerably in terms of strap width, neckline and armhole depth.
The special types of tanks made and worn for sports activities like running were and still are known as singlets, athletic tops and A-shirts as well.
From what I see online, today the tight-fitting kind of tank meant for men to be worn as undershirts and warm-weather or indoor outwear are commonly marketed as A-shirts and tanks.
I have no proof of this, but my general sense from personal observations over nearly 7 decades is that these types of garments have been called tank tops mostly when they are worn by girls and women, whereas they're generally called just plain tanks when they are worn by boys and men or by both sexes as in unisex tanks.
Again, I have no proof of this, it's just a hunch, but there seems to be something about calling a garment for the upper part of the human body a "top" that makes people imagine it as exclusively worn by women and girls. The glaringly sexist choice of photos used to illustrate different types of tops by Wikipedia in its page titled "top (clothing)" lends credence to my hunch: https://en.wikipedia.org/wiki/Top_(clothing)
ETA: A white tank of the "wifebeater" stereotype style was also famously worn by John Travolata in "Saturday Night Fever," Kevin Bacon in "Footloose," Nicolas Cage in "Moonstruck," Bruce WIllis in "Die Hard," Alec Baldwin in a movie whose name I don't recall, James Gandolfini and other men in many episodes of "The Sopranos," Colin Farrell in the movie version of Miami Vice, Hugh Jackman in "X-Men: Wolverine," Channing Tatum in "Magic Mike," Edward Norton in "FIght Club" and Richard Gere in some famous shots by Herb Ritts:
https://www.interviewmagazine.com/film/thirstory-richard-gere-pumps-gas-cover-shoot
(Also I added Robert DeNiro in "Raging Bull" near the top of this post where I discuss the stereotyped association to Italian men because in that movie DeNiro didn't just wear a "wifebeater," he played a real-life one of Italian heritage - the professional boxer Jake LaMotta.)