IMO men can't - nor should they - look at marriage as something that they can benefit from. Rather, marriage is something that men choose to do for the purposes of keeping the peace, retaining order and keeping tradition.
It comes from an understanding that "this is bigger than me, and my personal desires."
Because, you're never going to get women to go along with the idea of casual sex long term. It is in their nature to seek and desire a committed relationship and they're socialized to want marriage. There is a never ending emotional wave of pressure for men to marry. And it will come from women and their friends and family. Men with daughters will even pressure their boyfriends to marry, not because the boyfriend will benefit, but because the father will want her daughter to be happy and to get what she wants. And marriage is what they want.
Women benefit from marriage because it provides them security, provision and protection along with companionship and a partner to help create the lifestyle she wants. Men benefit consistent sex, loyalty, partnership and friendship. But I would definitely say a man's benefits pales in comparison to what women benefit.
There are certain things in life you may not enjoy doing... but you do it... eventually because an entire country of men who refuses to marry women (but will still fukk them) will create enormous complications; crappy family dynamics, financial instability and a never ending gender war.