Firstly, using the word model in this context is confusing, a better word would be reference.

You’re basing your argument off of your personal experience and what you’ve seen in this sub, and I’m basing it off of mine. I’ve never seen that happen in this sub when it was just a normal everyday woman in the artwork (including on works that display the proportions you listed). What I certainly have seen is an egregious amount of artwork that depicts bodies like Kylie Jenner’s (in some cases even worse and more dramatized than hers) while done in a realistic art style.

I have no problem with women pointing out that proportions like that aren’t natural. There’s nothing wrong with drawing any body type, but when one is trying to capture realism, addressing the fact that natural human anatomy does not look like that can be constructive criticism. Not only that, but it reminds women that their bodies don’t have to look like that.