I only use the sidestand to shut the bike off.
6 reasons in order of priority:
2) I know I didn't leave it in neutral so it can roll away after I dismount.
I have a up-sloped concrete driveway from my garage so I walk them out front first, and when I arrive back home, I turn them back up-slope before shutting them down. I would
never leave a bike pointed downhill in neutral. That works against the kickstand.
Having said that, when I have left any of my bikes in neutral, there have been times when they all have rolled some - usually when I'm tinkering with them, or disturbing them in some way. And, with the high kickstand on this bike, it doesn't take much. It's usually not too far, but I had my Harley (with a really long and low angle kickstand) fall over onto me while washing it once. It just turned a nice little inside arc around the kickstand till it was a wee bit past vertical and "highsided" me while I was bending over with my back side from it while getting ready to wash the wheels. Soap and gravity were working against me that day.
It only took once to put that on my reason list to make sure imy bikes are parked in gear.
Here is another benefit for stopping with the kickstand - meaning it is in gear. When you go to re-start it, it
won't until the kickstand is retracted and/or the clutch is pulled in. Potentially saves another embarrasing and expensive manuver when forgotten.