How is it fundamentally misguided or misunderstood? I gave a reason just in my previous post to you about how DLC can be implemented well and how something else can be done poorly. Taking out chunks of a game to sell as first day DLC is not usually a good way to release them.
For example, the From Ashes DLC of Mass Effect 3. The DLC contains a squadmate that EA claimed was not featured in the game to begin with, but then files of the vanilla version found that indeed his scenario was in the game. As in it was On Disc DLC. The DLC was availabe on disc, but you had to purchase the DLC to even play it. Or you had to buy the more expensive version of the game. Making people pay an additional amount of money for something that is already on the disc is an actual misguided understanding of how DLC should work. As I said, DLC should be done to give players a new way to play the game, or have an update that might explain plot points that weren't clear before. Such as the Leviathan DLC from the same game. That's an example of a good DLC. It came out a good time after, gave some new reasons to play the game again to understand the story and new ways to play the game by also offering new weapons. FFXV's pre-order DLC, while a bit excessive, is a good example of DLC that is also intended to give players a different experience depending on where they bough it. The suggestion of having an art gallery DLC doesn't work because he didn't give an idea of how it would be implemented and why it was even something that should be released as DLC other than "as a possibility". I gave a reason for how it could work, by saying it could be like the Crown Pieces from Kingdom Hearts II Final Mix (which, I notice you didn't even seem to read) and that if it was implemented like that, it'd be an example of a good DLC concept. Because it's giving players reasons to look through the world again to find these things.
It seems to me that you only consider my arguments misguided because you seem to think I'm against DLC. But I'm not and I have repeatedly stated that I am not. I said that I wasn't a fan with the idea, nothing more and I explained why. And if you are going to give up before you even hear my full response, then that makes you the straw man, because you are not willing to listen to what I have to say, and instead have done nothing but call me misguided and basically insulted me by saying I am an idiot. When asked if you would explain it, you did not, you only linked something that had nothing to do with your points other than to basically say you think I'm idiot.