Looking at the games industry where passion stands for self exploitation. If you don't push back most employers will take everything they can get.
Would they develop products faster if the employees worked less?
* Get a new job at game studio * Start off OK-ish, then get pushed to crunch more and more as release date nears and then slips (probably by design) * Release game * lay off most staff * They're broke for a while but the time without work is nice * Repeat
I can't find a source but I understand the average length of a career in the industry is 5-6 years. Also, I couldn't help but notice at my last place that those of us doing more general work (python, data engineering, etc.) were a hell of a lot more relaxed than those with video-game-specific skillsets (Unity3d).