I wear 'em, because DH put a box of gloves in my car and asked me to. Good enough for me. BTW, they are the kind d if gloves he always keeps in the garage (he's a painter), not surgical gloves.
FWIW, a doctor friend of mine is confused/marginally upset by all the people wearing gloves, because she says the virus lives much, much longer on glove material than it does on human hands (at least based on what she knows from medical info that was current last week).
I exit the car, put on my mask, pull two gloves out of the box in the back seat, close the door with my hip, lock the car, put on the gloves just before grabbing a cart and entering the store. When I finish, I unload the groceries into the back of the car, return the cart, peel off the gloves, tucking them together and turning them inside out, go to front of car, remove mask, enter vehicle, drive home. Once there, I wash my hands, unload groceries, dispose of glove ball, then wash my hands again.
But that is not the point. I did not say it was completely effective, or even necessary. It certainly isn't environmentally friendly. I said I do it because DH gave them to me and asked me to use them. Good enough for me. Under the circumstances, it seems entirely reasonable, even if it only makes him feel better. Of course, he does the same thing.