[watwut]

If you do not care about yourself, you may end up doing all that super important but non glamorous work that does not sound great when looking for another job. You will not have right checks and buzzwords on resume, cause you have been too busy doing useful "normal" work.

Consider also the latest "github is your resume" hiring fad. Do you think it is possible to crunch, give everything possible to your startup employer and have a pet project at the same time?

If you do not care about yourself, you will end up tired and overworked. Another potential employer will interpret it as a "lack of passion".

The issue is not limited to startups through. The same happen in established companies.