>>543038736
Much harder to stay motivated for parent runs, rather than going for an ace or even just to improve TT rank. At least with the latter 2, in the back of my head I know that a good run could give me a new "personal best" for that uma.
parent runs can just give you jack shit even if you do everything as you should. And even if you make mistakes in a parent run, you can still just get lucky and have something usable.