@@bru_no_3920 it also forces you to work with what you have instead of spending too much time messing around with the midi, and by having it as an audio sample you can stretch it pitch it and manipulate it in a lot of ways you can't with midi
It keeps you from editing after the fact (like lining this up into the grid) you get a more realistic style run, and then when you sample it it sounds more unique and harder to replicate.
not sure but i think it's cause he'd rather make pitch changes or chop the sample later in the process rather than changing the actual midi pattern or melody:)