I think it’s less typical to have a double major in two completely different fields, but I don’t think I’d call it stupid. I imagine there’s a way you could make those two beneficial for one another in some capacity.
I’m a physics/math double major, but I’ve often thought about double majoring in physics and anthropology. The two fields aren’t really related in any sense, but I’m equally interested in both fields. It simply isn’t a possible plan for me though, because the course schedules would almost completely overlap.