To me the players should have by far the loudest voice of what the Paladin class is all about. DM world-builders should take a back seat because at the end of the day they are not the key people that need to be pleased - if noone plays the paladin then the class basically has very limited impact in the game world..
For an opposite opinion, the character is part of the world. The player can choose to accept what the Paladin represents in the world and play that, play another class or find another game (table).