I also paid full price and bought it from an official store with no connection to any carriers. Installed grapheneos and can confirm it is still present, whether anyone can use it is not is irrelevant if your putting shit in my phone that could potentially harm me. And you seem to take some kind of weird moral ground thinking people who default on a payment can have their phone which is a necessity in this era, turn into a brick if they choose to. You're lucky you can afford to but be more empathetic to those who can't.

You’re not getting it. Again:

If you don’t control it, you don’t own it.

Buying something does not mean you control it. You might have bought an Amazon Ring doorbell but if Amazon does not like your behavior they can (and will) render it dysfunctional.

If you don’t control it, you don’t own it.