All the sets and combo sets are going to have concerns with low IQ, and it’s different for each. Zone doesn’t commit as many fouls as press in general, but that’s not the only consideration for defensive IQ; and when you play zone, it’s not even the most important consideration. An experienced zone team with decent defensive ratings is hell on the FG%, and can be very effective without elite ath or speed, letting you get value from guys with elite skills elsewhere. It’s also easier to cover for sub-par defenders, at least preventing a gaping hole from being ripped open.
With man, the drawback to low IQ is obvious - any weak defenders can be exploited. With press, you’re going to have trouble keeping a low IQ player out of foul trouble (playing primarily a press/zone combo, I’ve noticed that guys around a low IQ defender get into foul trouble quite often as well, maybe having to cover for mistakes - but I’m not sure if that’s real or imagined, nor do I know whether to attribute that to press or zone).
I guess i would land land somewhere in the middle on the debate about zone being less penalized for low IQ. You can “hide” weak defenders in zone, though as it regards IQ, that’s obviously hard to do when the whole team is switching over. And in general, especially at D1, it’s a mistake to try to hide anyone, unless they’re giving you a whole lot of value somewhere else.