By definition, a trade school is designed to teach people a trade, not what lies outside it. A liberal arts education (which OP was clearly referring to) exists to teach people about a variety of different things.

This might sound like I'm biased against the trades. I'm not! I think they're crucial, and I, along with about half the software engineers I know, often daydream about becoming a fine carpenter.

I'm also not biased against trade schools in particular. They provide an important service and are a pipeline to good union jobs. The criticisms I make at the top of this comment apply equally to students who go to a top music program like Juilliard or the Oberlin conservatory, as those graduates will tell you themselves. They go to learn music, not to broaden their horizons.