>>714866785It's not. The infrastructure for closed environments, privately hosted servers, or even fully offline and LAN functionality already exists, because that's how these games are developed and tested.
But developers want their games to die, they are all in on planned obsolescence and making you buy their next slop product. They've figured out that letting you keep your games to play over and over, god forbid even mod them for further replayability, is bad for business. It's much more profitable to take their product away from you and make you buy it again.