I agree that there are different approaches for different group of people. I do not begrudge that (most) Rabbis I learned from did not have significant secular education. Their productive contribution to am isroel and the world is self-evident. At the same time, I worry about multitudes who will end up being machmir in the mitzva of limud Torah, but meikel in supporting their family and leaving of tzedoka or non-Jewish support without any apparent reason.
Beshaato seems like a questionable approach v. chacham eynav berosho. Father’s obligation is to teach a son a profession so that he does not become a bandit. Are you saying, that the (grand)father’s obligation starts after kollel?!
Also, I wonder how universal these rules are. I heard from one father maybe 20 years ago whose son was in an anti-college charedi yeshiva in Israel. The son asked rosh yeshiva in private and the RY had no problem with studying computer science