Avira > Rav belsky would tell some talmidim
And I believe the same is true for many other Rabonim, including R Feinstein, that their private advice depends on a person, including Rav Pam’s advice to someone NOT to go into teaching. I’ve seen some who did not ask R Pam. Obviously, only the best should go into teaching, and traditional halakha approach of allowing unlimited competition between teachers works towards same goal.
I understand the idea of learning without thinking of college. This is fine as long as there are responsible adults who will direct the turn when appropriate. But where the focus is on learning and discarding those who do not keep up, may work well to train talmidei chachamim, but less so to develop a healthy community.