PSN Accounts

So today i tried to unlink a psn account from my SE account that was used on my third service account and was told i wasn't gonna be able to cause that would make my whole SE account unplayable on any play station equipment. I personally think if we are given 8 service accounts per SE accounts then we should be able to put each one on their own psn account if we so choose to play each on the play station. Each has to have their own code for the game on any platform so why not let us link them separately to different PSN Accounts?