It's mostly due to old, inflexible, stodgy companies. Analog Device, Texas Instruments, Intel, etc. have been around forever, and haven't updated the worst parts of their employment practices and corporate cultures since the eighties. Military is even worse, but it's not just military.

Right now, I work in a company where I have work-life integration. I enjoy being at work. It's a pleasant place to be. I enjoy working from home, and balancing work with family. I enjoy my vacations. None of these are hard or expensive. I'd never get that designing integrated circuits or in any other sort of high-performance EE work.

Why can't I ask for a pleasant office, with a nice window looking at something green, flexible (not short) working hours, flexible vacation (I do better with fewer / longer trips), comfortable clothing, and similar in the EE world?