Of course being unhealthy doesn't lead to success. I suppose the title might suggest that but obviously that's artistic license.

The message is that obsession is key and often the trade-off is in favor of time with the business and not time where it might be "better" spent.

If you're funded, you don't need this advice. If you're not -- and I've done two bootstrapped startups myself -- I'm not sure you can escape it.