PS4’s used game policy isn’t “because some other company is doing something”.
That's such a lie. There is no doubt Sony had some crazy DRM schemes in mind before Microsoft dropped the ball. Why do you think they were so tight lipped about PS4 before E3? Don't act like Sony is some pure, angelic company that cares about the customer first and foremost.
Remember, this is the same company who invented Securom, was caught red handed in the BGM scandel(installing rootkits) and has been a big supporter and abuser of copyright protection in the past.