DY: That is your own speculation.
No, it’s not. It’s a sentiment, which aside from its obvious merits, has been expressed by many gedolim (I know I heard it from my RY) and I recently heard it from a very well known menahel, from a mainstream chareidi mesivta (the overwhelming majority of their talmidim would never dream of going to college). The fact is, that in that mesivta, many parents feel as you do, and do not have their sons attend secular studies. The menahel stated unequivocally that those boys ended up no better than those who did attend classes; the opposite was true.
Eretz Yisroel has its own unique set of social and cultural issues, so the comparison is not valid, but your assumption that one can generalize that they are on a spiritual par with, and even exceed the spiritual level of b’nei Torah in chu”l, is most certainly debatable. Even if it were true, there are so many other variables involved that it would be ridiculous to try to prove your point from that angle.