This is the same "excuse" people use when they take mobility car parks "for a minute or two". People that don't use wheelchairs or that don't have a spouse/partner/child using a chair have no idea how many barriers are put up by those "minutes or two". They can't be expected to understand either but it would be great if people (generally, that is - not pointing fingers at anyone) were more aware.
I saw a variation on the usual theme this afternoon at the local supermarket. A woman parked in one of the mobility parks with the appropriate permits etc on dashboard but she was waiting for her able bodied companion to finish the shopping.
Not sure what your point is
The point is that the person who could benefit of the car park (this woman) wasn't in need of it because the person doing the shopping was perfectly capable of walking the car park from wherever they could find a spot. It wasn't a convenience for her, it was a convenience for this other person who didn't need it.