Mental load. I love autopilot tasks, and will happily do dishes sweep vacuum laundry whatever. But deal with The Pile? where random stuff has built up and each item has to be considered and handled separately? Oof, count me out. My spouse is the opposite, and used to get pissed that I didn't handle the piles, but now we do the stuff that we do best, though I still have to deal with my stupid desk pile...