1. There have always been things you have to pay for but don't get to keep.If buying is not owning, then 🏴☠️ isn’t stealing.
Ever bought a meal? Once you eat it, it's gone. Does that mean you should get to steal food?
Ever been to a concert? A sporting event? A performance of any kind? You paid money for something that you never owned and that you'll never be able to experience again in the same way.
Ever taken a taxi? Leased a car? Flown an an airplane? You've never owned any of those things, so are you saying you should get to take them freely?
Finally ever paid someone to do something for you? A plumber perhaps? A house painter? A doctor? You can't own those people (well not anymore) so does that mean you shouldn't have to pay them?
See how stupid that statement is?
2. Yes piracy is stealing, always has been, always will be.
Ownership is only one kind of financial transaction. If you don't like the terms, either don't participate or find someone with terms you agree with. The alternative to "I don't like these terms" isn't "Therefore I get to take it freely".
Unless, that is you are willing to sell me your home for $1. If you don't agree then I'm just going to take your house and by your logic its not stealing.