Dear Rocky,
A. Rav Aaron Joey people that were learning despite being wealthy with a matching lifestyle. He could not understand it. He said it was one of his biggest kushyos.
B. I think he would say it is worth it. While he would do everything he could to help the children make it feel worthwhile to the parents.
C. Simply not true. They have guidance. Maybe it’s not the best guidance. Look how many Rabbanim there are in Lakewood today.
D. Maybe dens short term kollel guys there is some truth. Long term learners know a lot.
E. I disagree. The responsibility is there. Just there are less ideals today. It’s hard to see a cause worth dedicating one’s life to, in our times.
It’s obvious to me, that the merit of today’s system is as a supporting infrastructure for that thirty or whatever percent.