Sacrificing one's health to launch a startup, or to launch anything for that matter is a choice. Unless it's not a choice because one feels powerless in terms of their capacity to prioritize what they value.

If a person values health, they'll find a way to preserve their health while they launch the startup.

On the other hand if health is not something that one values, then sacrificing health is not a concern...sadly this is the case for many entrepreneurs as my experience with clients has shown me.

I'm a proponent of not just preserving, but using health to leverage one's capacity to launch a thriving business.

The two are not mutually exclusive but in fact one can fuel the other as experience has taught me.

Hope this helps,
Ken