Well no one is saying they can not be useful, our entire premise is that if a guild does not need you, you have no real purpose. Also there was actually quiet a lot of theory crafters from the vanilla era that were seriously way to ahead of their time. The issue was that since it was the dawn of that era we didn’t have the tools readily available knowledge to obtain them.
The problem is A LOT of people will level a paladin with this dream only to find out a harsh reality. No one here is saying do not play paladin just do not have these dreams of greatness without serious over the top work and still have a low chance to succeed.