and are completely oblivious to the costs of their way of life (and certainly won't listen to a politician who mentions the existence of such cost)
The costs are more than likely paid by others, which is why they're oblivious.
Far easier than convincing them would be to stop subsidizing them, sprawling car dependent suburbs are a giant money sink that the people living in them rarely pay for.
You're likely reading this on a device that was invented while plenty of ignorant people were still not enlightened.
(I admit I may have worded my comment a bit better with a "that" - 'If innovation can't happen until the ignorant are enlightened we're never going to see that innovation.')