>Maybe you can get away with doing just your job and going home to relax. I would wager, you may have difficulty finding your next job however.
That's just not how it works outside the Valley. I've only crammed extra hours in to meet a deadline a few days a year, and only at one company. I've worked at 3 different companies in two different cities 400 miles away. Nobody expected 80 hours a week or whatever and I, quite frankly, wouldn't do it because I value time with my family and I'm not productive 80 hours a week. We also highly value experienced programmers and they command a higher salary. I don't have a government job either and I never have. "Valley culture" isn't synonymous with programming as a profession.
Any Marissa Mayer? Isn't she mocked for her poor leadership?
There's a lot more to running a successful business than people being physically present on Saturdays.
You're running into quite the hyperbole. If programming literally makes your lungs stop working why keep doing it?
>You are most likely in your early 20s.
I am in my late 30s.
Programming in general is a really good cushy job. Valley culture is what is toxic. I'm sure it you worked construction 80 hours a week for however many years you'd be in much worse shape than if you were getting paid a large salary to write some CRUD app.