> For people who were not born into strong safety nets
"Hustling" as you call it is pretty much the only way to start a successful business exactly for the people not born into "strong safety nets" and "privilege" as you call it. If you have those you can start your business and coast.
I don't know any business owner - including myself - who didn't have to make sacrifices to his or her well being to push through. That's the thing with having a business, there will be times were you just can't relax or take a day off. You are in fierce competition with the world, and as a founder you should work at a minimum twice as hard as somebody who is hired. It can and it will lead to partial or complete burn out, but one thing that I've noticed among myself and every other business owner is that they push through and simply don't get sick when they can't be sick. After it's over and they've pushed through a project or a season, they will get sick as dogs and disappear for a couple of weeks to lay on the sofa. The overload cannot be constant, you need to have some time to recover in the foreseeable future.
The human mind has an incredible force to resist becoming ill and for those who cannot channel this, starting a business is a bad idea. Being ill is mainly the body's reaction to fight the sickness, so it's somewhat under our control.
Having a business puts incredible pressure from all sides on a person, and you can't be a person who thinks about "tapping out" as an option. Especially in situations when other people's salaries depend on you.