Eh. I get what our boomer bro is saying. It's fun to do things that feel good. But there's a big fucking difference between sex and relationships. I wouldn't even call myself mgtow (because I've seen how easy they are to manipulate and how much of their "freedom" propaganda is actually just sour grapes over not being picked by females) but plenty of mgtow do pursue casual sex. Hell, a lot of guys who never heard of mgtow pursue casual sex because they just prefer it. If you're a man, you're young, you have money and you're good-looking then why wouldn't you go for casual sex instead of marriage?
You have to differentiate among the woman-haters or woman-avoiders, between those who abstain out of choice, those who abstain from relationships but not sex, those who abstain involuntarily (incels), and some combination of the above.
There's also a ton of mgtow who are just bitter divorcees (like Lindsay's Liver could become if his wife ever leaves him) and their woman hatred is nothing but misplaced bitterness and salt from the way the justice system screws men.
Also some dudes are genuinely just assholes who deserved to get divorced, but they still go full mgtow and sperge out over it. I've seen this personally. Mega-massive asshole men who get rightfully pwned by their wife and lose their marbles.

Think the typical cheating husband alcoholic type who winds up divorced with nothing.