Or if you want an even simpler answer: for the same reason the majority of users of ordinary dating websites are men.
For so many men, they seem to have gotten the basic training but never finished the course. It’s the process of discovering that other people are different than you, that your unfiltered thoughts are bothersome to others, and that treating others as objects or targets will make you a pariah.
And the internet doesn’t prevent socialization, it substitutes it with an online version which fails to do the full job.
Go watch some movies from the 1930s or 1940s to see how expectations of men have changed. Yes, they are movies and idealized. But acting like an ass and then talking about why nobody will date you was not on the menu.
As far as I know, just by nature of there being more short than long relationships, In most cases cheating occurs rather early; so its a massive waste of time for every party. Seems short sighted and immature to me.
Not telling you you're wrong, just asking for a different take.
https://www.psychologytoday.com/ca/blog/the-myths-of-sex/202...
https://www.businessinsider.com/how-long-married-people-wait...