I think you're underestimating the number of people who have what you consider "very specific work hours". Of my friends, I think I'm one of the only ones who

I think you're underestimating the number of people who have what you consider "very specific work hours". Of my friends, I think I'm one of the only ones who gets to dictate what time I go into and leave from work. I think it's fairly unique to the tech industry, this ability. It is indeed just a symbol, time, but the symbol is given meaning by most people's employers, and as such ends up carrying significant meaning in a person's own life as well.