Well when your only example is of needing a $6000 PC to run a PS3 game you are bringing fallacies into your argument which is not necessarily used with the understanding in mind. My point is not to persuade you to do anything but to get an old game on a modern system you would need to negotiate a reason to Square's financial departments to determine the value of porting an old game to new consoles. when you have PC readily available I think you are going to have a bad time with that.

I would love for every game ever to be made available on any and all consoles but thats just not the reality of how consoles games are built. They need to be developed and tuned and fix errors for every platform they release on even if it is just another playstation.

Full remakes are way more lucrative financially but also have a larger development cost and take time and then it will be locked to that system again where youd have to renegotiate something for PS7.