I think the epitome of this is that “the vast majority of women don’t have or like casual sex”. Total and utter bs. Contrary to overstated belief on this subreddit, plenty of women love casual/no string attached sex granted that it's with a very hot man. Outside of the context of a traditional women with a very traditional upbringing, most women are more than fine having casual sex — many of them subconsciously understand too that if they really like a guy — there's a good chance a lot of other girls like him too, so they need to put out to try to keep him interested.

Another lie commonly propagated on this forum is that "women want commitment". Sure, some women, especially those from traditional/religious backgrounds want commitment. However, if you really think the average Gen Z or young millennial woman gives a flying fuck about commitment, you're either in some obscure pocket of the Bible belt, or you're totally delusional. Women nowadays only start to really consider commitment as an intended intentional goal in their late 20s/early 30s at earliest. The women who do get married younger were either more religious, or they happened to calibrate their S/RMV appropriately to find a guy who would actually match them in the commitment threshold.

Which brings me to another point. The "men just want sex and don't care about commitment" bit ironically only describes a small subset of men. Plenty of men would love commitment if it meant semi-regular access to intimacy and sex. The problem is most of these men who want commitment are not the type of men women want to commit to. So ultimately, women project that men don't want commitment, but it's more so the men with lots of options (aka the cluster of men women are most attracted to) who have no incentives for commitment who don't quite want to commit.

Another caveat is how much men care about the n-count of a woman. All men care, but to drastically different degrees. Again, if the man comes from a religious/traditional upbringing (sensing a trend here?), then he's likely going to be far more preoccupied over a woman's n-count over a man who didn't have said upbringing.

I could go on and on, but there's so much unaccounted nuance in all of these varying situations — and ultimately, I think it's a result of people projecting their own worldview of intergender dynamics more so than it being an accurate aggregate view of things.