But it's ok to drive around with 12 of these cells right.
Yeap, sure is.
You can't ship motor oil or petrol by air either, but it is OK to drive around with 50 litres of petrol under your seat and 5 litres of hot oil behind your front bumper.
Batteries are safer than a tank of petrol because they hold substantially less (stored) heat energy and don't spread flaming liquids all over the road after a crash. Ruptured fuel tanks kill dozens of motorists every year, but no ones freaking out about it.