”There is a growing trend of guys voluntarily withdrawing from the dating pool with the idea that prostitutes are cheaper than girlfriends and do not require an emotional investment.”
Wat?
If it’s a growing trend, it’s growing in a very different world than the one I live in. Either that or its fake news. 
Relationships are work. Some guys think once they have the girl, they don’t need to work at it anymore. Good luck with that.