Pravda and our betters in their Comments tell us that science and engineering are hard.
As a Ph.D. scientist, I think it's only because they want a certain personality in the biz.
Science is the nearest thing to magic in the real world. If the most pedantic weren't teaching it and doing their best to drive out the creative, their rice bowls would be threatened. If people knew and understood the world they live in, those who rule- who fund only the most pedantic- would have a much harder time with their hegemony.