Marriage is more than a license to have sex or produce children. It has deeper meanings and different cultures have different ways of viewing it. It also has a lot of significance for all the different religions. Of course, its an entirely different matter for the non-believers.

If someone feels marriage is a waste of time, then they definitely should not do it. For that matter, if you feel that going to university is a waste of time, then don't do it, because even if you do it, you will not be faithful to yourself. Same goes for most things in your life.