Lyxen
Great Old One
No. But it isn't like they are the boss of me. I am not playing the game for them. The author's intent is neither magical, nor binding. Indeed, in some cases (especially older ones) I'd question whether the work actually meets the stated intent! Just because they are the author doesn't actually mean they are correct about its best uses - to assume so fits the logical fallacy of "argument from authority".
You can assume what you want, still, the game has a clear design intent that permeates the rules. And my perspective is that it's a very skewed perspective to not only consider part of the rules as absolutely binding and others as totally unimportant, but also to look down at other people for taking everything as intended, just a game with guidelines about having fun.
In contrast to this is the fact that, with most arts, what people can do with or get out of the piece is often far larger than the artist's stated intent.
Good for them, and good for you with the game. HOWEVER, what I don't like is for people to come in and tell me that optimising is required, that what I'm doing is either optimising in disguise or that it is irrelevant to discuss. Because not only is that way beyond the intent, it is CONTRARY to the intent.
There's far more powerful arguments than waving authorial intent around. But even then, those powerful arguments are best used in terms of identifiying a specific need someone has, and helping them fulfill it, not as Decree on How the Game Should Be Played.
And this whole thread is about how the game should be played, as long as you optimise, otherwise, it's irrelevant.
On the other hand, advice from people who don't know you or your players is often of limited utility. Which is where you fall flat - however weak authorial intent is as an argument, you aren't even the authority yourself. You are rhetorically beating people over the head with someone else's authority.
It's still way better than being totally dismissive of playstyles that are not optimised in one way or another, because pray tell me where the authority for THAT comes from ? Don't tell me how to play my game (especially if it's not even the stated intent of the game itself) and I won't tell you how to play yours.
Setting aside that such a generalization is not a universal truth, we have the fact that as a tool, D&D, like most RPGs, is not a focused tool, like a hammer. It is a pocket knife, a multi-tool, intended to be used for a wide variety of things, in a wide variety of situations. It is a highly flexible tool.
And so are other editions of the game, and so are other roleplaying games. Still, despite being flexible, there are limits, which make each edition/game more or less suitable to be played in a certain way. For example, in another thread, someone is (again) complaining about the encounter difficulty calculator. If you want to play a more "combat as sport" game (but still with some level of roleplaying), you can sort of do it in 5e but honestly, it's way inferior to 4e for that, because you will not be frustrated by the encounters being off for the challenges that you present.