A true "Stupid idiot" in my book would be like someone who keeps going to jail for petty vandalism that they post on their tiktok with only 100 subscribers. Sure, there is plenty of them, but they are not the most dangerous person out there.
The drunk driver who is highly capable has never been in an accident before. He does all kinds of stupid stuff because he is so capable. His reaction time carries him through. His instincts tell him just how far he can push things. Till he goes one step too far and mows down a family. I don't blame stupid, I blame confident.
A programmer is very clever. His code is perfect. The project is in the toilet because it's unmaintainable. But hey, not his fault nobody else can understand his genius code. The few who dig through it have to admit, wow, that's impressive.
The hacker steals the little old ladys life savings with a 0day he found himself. Where's the stupid? He won. He was untracable. He's somewhere on the beach in the Carribean, which is apparently a place people want to be.
The company makes an unsafe drug. The chemist was smart enough to do chemistry. The exec can manage a company. They didn't test well enough. People die. No stupid needed.
The math genius turned philosopher(Ahem... Kaczynski) sees the world through a very objective lens. By a system of principles, he determines tech is the enemy. He kills in the name of this ideology. There aren't many flaws in the reasoning, the only problem is he is forcing his values(Like people having survival goals instead of surrogate goals) on us.
Stupid people can use processes to decouple the results from their own skill and action. A confident person will not, and as such any imperfections they have show. And we all have imperfections.
Would you rather fly with a below average pilot who woul5 call the cops on anyone who doesn't follow the checklist, or the worlds best pilot in terms of basic talent, who doesn't think he needs a checklist and does a few show off dives in the flight just for fun?