Things work better if everyone is more courteous and thoughtful about other peoples needs than they currently are.
It's also nicer if everyone quits judging other people - none of your business why they've chosen the spot they have, perhaps they walk fairly well for a few yards, but only have a short time frame for walking before they need to sit down/get on a scooter/lean on a trolley.
We park far away if we can, in summer when its warm and light because my powerchair means the distance isn't an issue.
However if its cold and wet, and I get cold very easily and warm up very very slowly, I'll want to be much closer, to avoid triggering an autonomic crash (10 to 14 days of cycling through shivering so hard it hurts/pouring sweat is not fun!)
If its dark, particularly dark and wet - my main chair does not have lights on it, negotiating my way through a busy car park in the dark with lights reflecting everywhere off the wet ground isn't great, much higher risk of being hit by a driver whose brain switched off the second they entered the carpark.
Ideally of course, all accessible spots would mean I'd be out of the car and onto a walkway without going on the road at all but in reality, most spaces we can't reverse into due to the anti-ram raiding bollards, and many still require you to be in the road for some distance before you can get to a dropped kerb.