A different way to think about it is, a full EV has larger range and that full EV is likely to have more EV miles to empty than I have. If I want to stay in EV mode I need to charge more often, and am more dependent on chargers out in the wild. The full EV is likely to have enough charge to make it back home, but I understand that may not always be the case, and of course it makes sense to give up a charger to someone in that situation.