For example if you were to ask me, by that logic Bard shouldn't exist, as it's too humorous for D&D.
+infinite upwotes.

:P
It is absolutely necessary to codify morality and law into that system. It's there for a reason, and it has been a great part of the game from the beginning.
Serious question ... i really dont know:
Wasnt aligment system scratched out in last edition?