The big green button lies. They are trying to bend the language to mean things that it legally doesn't mean. Just as they call unauthorized distribution of content "piracy" or "theft" (it's neither), they call a temporary revokable permission to access their content "purchase". And if you click that button, you agree with it knowingly. When it bites you in the nether regions, they'll remind you that was exactly what you paid the money for. Nobody forced you to pay money for that, you did it voluntarily. You are the one that gave them all the money to build this system.
I understand that you may value digital goods. I have some I value too. You just need to understand that just as with physical goods, even more with digital ones - if you don't control it, you haven't bought it. If somebody could just come and take your car, any time for any reason, you haven't bought a car. If somebody can just come and take your game anytime for any reason - you haven't bought a game. You bought a ticket to play it, maybe, but that's wholly other business.
I understand this well enough to at least keep offline backups of my paid content libraries (because I’m older and can afford the expense). Yeah, because of DRM it may be troublesome to access the content if my account was banned… but it gives me more ground to stand on (with our current unjust laws, both in court and in the court of public opinion) if I only claim that the content I already downloaded should still be accessible.
Your car analogy is interesting… If your car was paid off but got repossessed later because you said something nasty about the dealership on a forum, that would be a gross miscarriage of justice, even if they buried a clause deep in their sale terms granting themselves such an unconscionable right.
I understand that you may value digital goods. I have some I value too. You just need to understand that just as with physical goods, even more with digital ones - if you don't control it, you haven't bought it. If somebody could just come and take your car, any time for any reason, you haven't bought a car. If somebody can just come and take your game anytime for any reason - you haven't bought a game. You bought a ticket to play it, maybe, but that's wholly other business.