Who is a founder necessarily hurting when they sell their company to a PE firm?
What I'm hearing you say is that once a founder starts a business and hires a single employee they must operate that company until death. That seems like a ridiculous position to me and perhaps you're missing some fundamental knowledge on life. If that were somehow codified to law, I would've never started a business.
Surely there's a lot of middle ground between "it's wrong to sell your company to a PE firm that will suck out all its money" and "once you hire a single employee you must operate that company until death".
If you are an alien learning about humans, you should start with some children's books. I think you're missing some pretty fundamental knowledge here