Tesla is saying that even if you drain your battery driving, it would still take 30 days of failing to charge it to brick it. While the infrastructure for just "filling up real quick" may not exist for electric cars, the infrastructure certainly exists at a person's home, otherwise, they wouldn't buy an electric car.

I think there would be a much more compelling case for this if electric cars were being mass-adopted, and the education for maintaining them was poor. Neither is the case here. Electric cars are still largely in the early adopters phase, and Tesla is telling people to not leave their car unplugged for months on end.

Much ado about nothing.