Hmmm.

It can be argued that it is closer to the times when you would invite your friends over to your house to play a game or watch a movie. Only now the house is your account.

A game is bought by you or your friend, or both. It is similar to landing somebody a physical copy of a game.

Confirming that it works on PS4. One more thing, if you are offline you cannot play your games, only your friend’s.