I actually pick on someone close to me [in a loving way] for this very reason, lol. Person is an extreme intellect, two degrees and a masters, avid reader, seen her solve 1000 piece double-sided puzzles in a matter of days, yada yada. Asker her to put a three-piece bedframe together, ask her to put a five-piece towel rack together, ask her for directions to something 15-minutes away = she. just. cannot. compute. It's kind of funny, imo. Always wondered why that was a commonality among big-brains as she's not the only one I've noticed regarding this and somebody said 'it's because they over-think, over-analyze, and don't pay attention to the minute.' That's when it finally clicked for me, lol. Big-brains just don't pay attention to the smaller things.
All just my experience, opinion, and speculation.