The problem is that your idea of a perfect Labour Party, my idea of a perfect Labour Party, Kenny's idea of a perfect Labour Party, EP's idea of a perfect Labour Party, Trev's idea of a perfect Labour Party, Darlo's idea of a perfect Labour Party, they'll all differ quite a bit despite us all being natural Labour voters. Without considering say, Johnny, who without wishing to put words in his mouth might be one who floats towards and away from Labour based on what they're offering.
Being puritanical about it makes you Owen Jones, and I don't think even Owen Jones wants to be Owen Jones deep down.