This implies three things, none of which I consider to be true.
- Every edition of D&D has been designed perfectly correctly from the word go, so it isn't possible for anyone to improve upon what exists.
- People who get paid to design TTRPGs are necessarily more knowledgeable, skillful, and effective at game design than anyone who is not paid to design TTRPGs.
- It is impossible to critique design work unless (generic) you, personally, were among the people who created it--outside critique is inherently invalid.
A game can be designed badly. 3rd Edition specifically set out to be
more balanced than the edition which preceded it, and objectively, unequivocally
failed at that goal. This disproves point 1. Similarly, while I have more respect for professional game designers than some here do, it's simply not true that just because someone has done game design as a job that that will somehow magically make them better at game design than everyone in the world who has never done it as their job. And we would all have to be crazy or stupid to be discussing game design on a forum
for a website about TTRPG news and reviews, right? Like...if criticism isn't possible, ENWorld should never have existed, yet it does.
We should not ignore nor discount the ideas of designers. They
are paid for a reason! They didn't get hired out of the blue for nothing. Even designers I almost always strongly disagree with, like Mike Mearls, still deserve respectful attention to their design ideas. But this notion that we cannot do better than the old masters? Poppycock, pure and simple.