The Yeshiva you are describing wants Torah without Bizayon (disgrace).
When someone is forced (G-d forbid) to go begging or on real welfare because he was discouraged from “learning a trade” I see tremendous human suffering and an undermining of Kavod HaTorah.
Every boy needs to be counseled separately, and only those who are not at risk of disgrace should be advised to pursue the Kollel path.