I’m not a “pro-gun” person (although I’m not opposed to them if reasonably controlled). But I think that the way that argument goes is that it is easy to get on the “list”, even for very specific issues unrelated to being a threat. And once on the list, it can be hard to get off. Same argument for allowing people on the no-fly list to get guns. Not saying I agree with the argument, just sharing what I’ve heard.
I wonder if it’s too easy to get on the “not mentally fit to handle your own finances” list.
When it comes to guns I’d rather a few people be wrongly denied them than a few people be wrongly allowed them, especially if it’s a question of mental faculties.