Yossel Pupik, I don’t know any Yeshivisha men well and no bucharim at all, so I can’t really tell, but I’m skeptical that there’s no negative side effects on the majority of bachurim by marrying so late.
I’m not saying a boy should get married by 18, 19, although most of the boys I know are serious boys who go on/went on to set up beautiful families , but by 20,21 it’s important to establish a family. Learning long term if applicable, i.e the wife having a job that doesn’t put the family in second place or the shver HAVING the money and willing to help out, can be done after getting married. You did try to convince me that American boys “need” to learn till age 24 unlike Israeli boys who are in shidduchim by 21 because they will always be in kollel. I don’t buy that. American boys can get married and be in kollel too.