Actually, I can answer that one, Segev, from my parent's point of view..
My father and mother, both of whom merit the use of a card or plate (he uses braces and crutches, she is legally blind) for the longest time refused to use them. Dad would simply walk wherever he wanted to go, and if that meant parking farther than those spaces, allrighty then. Mom, as long as you could guide her, or she really *really* knew her way around, also would just walk around. Heck, she drug us kids around malls no problem, but still had to have us read things (which was somewhat uncomfortable when you're a male teenager and it's the tags on... well, intimate items. But someone had to do it, so I did, when asked. Is what it is.)
Mom just liked walking. Still does. So it simply doesn't matter to her to have the card.
Dad just didn't want one. He figured he could do whatever a person without braces and crutches could do. And frequently does just that. He once solo'd an 8 foot barn door mounting. Still won't tell us how he did it. Took three of us boys to put the other one up. He does that, making us look bad.
And if you want a race, prepare to lose, he's got four legs.
But eventually, he finally got a placard. We just said "about time, you deserve it, man."
Just for the record, they are awesome people. And my heroes. I don't think I tell them enough, but when I do, they go "oh, shut up" or such like that, as they never aspire to be anything but themselves.
Doesn't change the fact they're awesome.
Ok, gushiness over. Love them 'rents.