You currently don't have access to infrastructure software because you didn't buy that. You bought a game that uses it.
Given your BMW mention, if you buy a car, do you own the road it operates on? No.
Well, maybe that's separate right? BMW doesn't own that road, so what about the factory it was made? Do you own that? No.
I do online banking. I own that too. If they shut down for some reason, I should have access to their codebase? No.
I have an Amazon account. Do I own AWS infrastructure code? I mean I paid for that, right? No.
It's not that laws can't be changed, nobody made that argument.
It's about feasibility. Is it feasible for me and justified for me to own AWS infra because I paid for an Amazon account? No.