DND is not a good universal game system. It's pretty good at being DND, but that's a particular beast that's mostly about resource management.

You can definitely use it for a game about social intrigue, or horror, or modern day anything, but it's not really good at any of that. Like using a hammer to put screws in, you'll probably get something done, and if you're hanging with your friends you'll probably have a good time. But it's a weird tool to reach for.

Personally, I don't think the core of the rules system is very good at all. Flat probability feels weird. Armor as all-or-nothing is weird. Hit and damage being split into two rolls is slow and weird. In the latest edition, making very few choices about your character often feels bad. Levels are a very coarse unit of growth. The magic system somehow manages to make magic not feel like magic- no wonder, no mystery, it's just safe and standardized. I could go on.

But it's mega popular and people are emotionally invested, so there's not much to be done about it. There are dozens of people playing the thousands of other games out there.

Also a lot of people have never played anything else, so their analysis and defense of it is often lacking. Like if I've only ever played baseball, and never even watched any other sports, I wouldn't feel qualified to talk about bowling. But you get people saying like "no you need to wear cleats that's a universal property of sports" when bowling comes up. Like, not every game has six stats. Not every game has attributes like that at all.

And again, if you're having fun with dnd then that's the primary goal achieved. We don't need to maximize fun and efficiency in all things all times. I just think that it would be a good experience to branch out more, even if it's scary, because that will lead to a richer experience overall.