Dear Yserbius,
The answer is that the RY do not reject general studies. It just didn’t really work. This is a fact. You insist that it must be an ideology. That’s a lie. UJM agrees with you. He has an extensive resume. RY of a Lakewood Mesivta is not yet one of them.
A standard seder hayom is at most four hours first seder, three hours second seder, and over at least an hour night seder. That’s eight. Maybe you are including time for davening.
There are many competent teachers in Lakewood. But most of them would rather be teaching gemara. And teaching secular studies in a Mesivta is only a part time job. Remember that women teachers is not an option.
I don’t know why the people who know their sciences would forget them, or move out of town. Additionally, why would the more knowledgeable type stop coming? At one point there was a theory that there wouldn’t be enough frum pediatricians in Lakewood. It didn’t play out. Lakewood is much more attractive to people with degrees that are serious about their kid’s Jewish Education. And with all the expansion, there is a neighborhood for every type.
And now to answer your question. I assumed you were talking about math, science and, social. Nobody who wants to be taken seriously would suggest that these kids are violent because they do not know enough math or science. Suggesting mushrooms as the root problem would come across as being less clueless.