I can't play with them separated. My brain breaks in half and cannot figure it out, lol.
I do feel I have average to above average motor skills, but having the joycons split and not bolstered makes me hold them more naturally far apart, which causes my sense of aim to become quite disjointed.
Maybe I could do it with practice, but this isn't skyward sword, so it's safe to just use my Splatoon 2 grip for now.
When all is said and done, the pro controller is probably superior due to the more natural placement of the gyro sensor, don't you think?