I'm pretty sure I've seen Hemo mention humanizing your MIDI velocities, durations, and timing at least once a week to someone on the forums or Discord. This track is exactly how you do that with a piano piece! It's not done to sound more real, although that's a consequence of humanizing - it's to bring the emotional weight of the writing into focus for the listener.
Don't mind me, just gonna go sob in the corner for a bit. :'-)