Thank you for the interesting question.
What in particular gave you the impression the Haredi community disregards secular studies? If it’s because they are not taught at schools, that’s not because they are not valued, but because other things are valued much more. We believe it’s much much more important to raise the next R’ Akiva Eiger than the next Newton, but that doesn’t mean a Newton is worthless.
I’m not saying you won’t find Haredim who think all secular studies are worthless. But you’ll find people who say all sorts of things. Why they do that is a question for sociologists and I doubt the answers will uncover any important truth.