Earlier quoted context omitted.
That's how all currency trading works. Why do you think this is unique to Bitcoin or crypto? More than 95% of "money" in circulation was created in the private banking sector. That's the closest thing to printing money because that's actually what it is. Paypal is just taking a cut for providing a service. Don't like it? Don't use it.
You can show up at a bank and demand your balance in central bank money aka cash. The equivalent for Bitcoin would be that Paypal has to send your balance to you on the blockchain. But they do not do that. They will pay you in dollars. How much dollars? However much they like.
If everyone would try to do that the system would collapse. The system is built upon the assumption that the vast majority of people don't do that.