I am not sure it is most, but I take your point. I think the issue is D&D has long catered to both styles of play. So that is often where changes like this can introduce issues. Even in campaigns where you have more nuance, there is often that gauntlet like atmosphere once they are in the bad guys lair kicking butt
My point is while I personal tend to prefer settings with more nuance, I don’t think it’s inherently superior. There are perfectly valid reasons to want an evening of killing monsters
But there’s the rub: none of these changes actually create issues for individual tables. If you want to run orcs as monsters, there is nothing actually stopping you from running orcs as monsters. If someone wants their Dwarven wizard to be hardy and stout at the expense of being smart, as the article suggest, there’s nothing stopping people from making their character that way.
The issue is not that the rules are stopping people from creating characters or campaigns that they want; it’s that they no longer see themselves reflected in these rules. It’s not being a Grognard; it’s being a grumpy old man who doesn’t like that the rules no longer enforce his preference as the default state and others have to change for him - he now must change for others.