It pains me to say this, but I think we need to stop fighting an uphill battle here. The reality of the matter is that it is absolutely true that women can get sex easier than men if she is willing to take the risks inherent to hooking up with random strangers. "Easy" meaning being able to find someone that she finds attractive enough to have sex with. However, I think that most guys can readily have sex if they are willing to fuck someone 2-3 points beneath them. He might have to subtract 4 points if he's letting women do the approaching. This isn't to negate the reality that the sex that women have with "Chad" is often bad, but it is to point out the reality that the tier of men that women choose for casual sex is often very different than the tier of men that she can get commitment from. Even women who sleep with people they know well are often sleeping with guys "out of their league" because casual sex is casual sex for a reason. Women often have much higher standards for the guys that they sleep with while men are willing to lower their standards considerably for a warm hole for the pole. This is usually the reason why FWB scenarios often end up with the woman wanting commitment from the man instead of vice versa.

Since around 82% of unattached single women have had casual sex, you can pretty safely assume that most women have had the experience of hooking up with a guy out of her league who would never commit to her or didn't want to deal with the reputation of dating a "slut". This creates a situation in which the woman a man ends up dating is often the most attractive he has ever been with, while for a woman her SO is often less attractive and in some cases significantly less attractive than the guys she had been with casually. There isn't much vetting you can do to prevent yourself from being in this situation because of how pervasive it is. This is the reality of being a man and we must accept this.

I suggest that men who want a sense of parity should just go seek an escort to overcome the perceived power imbalance. It may not be the best sex you've had, and it probably won't make you feel very desirable, but you're doing the male equivalent of AFBB. The sexual revolution has been enormously successful in destigmatizing casual sex for women. I believe that there should be an equivalent destigmatizing of sex work so that at least people can get quality sex from someone who knows what they're doing. I also believe that there should be a greater push to make women aware that just because a guy sleeps with you, it doesn't mean that he finds you particularly attractive or interesting and that a lot of guys, especially on dating apps, will fuck anything and will say and do whatever it takes to get you into bed. We should view casual sex for women as the same as prostitution for men.