"That's because you're still failing"
If you have work 100 hours a week to barely survive, then you are doing something wrong.
Building a business is very much a roller coaster ride.
You work hard to land a couple of deals. Then you work harder to make sure those deals stick. Then you figure out a way to hire or contract out the rest of the work. Then you try to land more deals and so on.
Hopefully, one day as a founder you are able to work as much or as little as you want and the business will still thrive.
Then, of course, you look to sell.
I don't the idea of extremes: "It's easy to build a business, I can do it on 15 hours a week." or "I have to work 100 hours just to break even and make payroll."
If you are doing either one of those, you have a problem, in my opinion.
A hearty "mmmmmmmmmmeehhhh" to that quote. Yay to the rest of the post.
There are plenty of non-failing businesses out there that do not require you to sacrifice your nights and weekends. The fact that you're not running one of those is neither a credit nor a discredit to you. It's just a certain type of business and a certain approach to business, which is not universal.
Yeah the problem is probably that each on of them defines success differently.