What yeshivos need to teach their children is that making a parnasa is the most ruchnius thing there is. One uses a brain that Hashem gave him, his eyes and his hands and his legs and has a place to go where he can use these, and does 8 hours of work, using the raw materials Hashem placed on earth, and creates some product or value, and presto, miraculously bread comes down min hashamayim. It is a peleh when you think about it. The biggest nes that there is, that Hashem has created a world that can sustain all creatures with what he put into it. For example, all computer chips are made from silicon. What a miracle that this is basically sand, found everywhere. Millions of people in the computer industry make a living from sand.
Instead of denigrating work, we should teach how much of a ruchnius experience it is and how it creates such simcha when one can bring home a sufficient paycheck. We rob our students of this, and hurt them for life by feeding them propaganda that work and secular studies are treif.
Incidentally In Orach Chaim 306, it says explicitly that one is permitted to arrange a teacher to teach his son a trade even on Shabbos, since it is considered cheftzei shamayim. (Chafatzecha asurim, cheftzei shamayim mutarim.) The Mishna Berurah says that because without a trade, one will turn to theft (based on well-known gemara).
How in the world did the yeshivishe velt manage to invent that a mefurash halacha no longer applies?