Marriage in one's 20s is the recipe for divorce.
Nonsense. Address teh reasons for divorce and we can lower the rate of divorce.
There's no reason to rush into it while one is 25. That's just way too young.
Your desire to have the normal period of peak fertility to be.... out of normal bounds of family planning, is an unhealthy and unnatural society you want to have.
it is a bad idea, that will and has, has bad results.