Go to a shopping center, or a sporting event, or any other place where people publicly gather en masse and ask yourself how many of them could realistically get

Go to a shopping center, or a sporting event, or any other place where people publicly gather en masse and ask yourself how many of them could realistically get around on foot. There are a lot of very fat people, old people, disabled people, and so forth who could not walk for half a mile. Is walking now an utopia? >We aren't going to rebuild our cities around bikes, and even if we did, a large number of people could not use them. On the other hand, we already built our cities around cars, and self-driving cars would fit right in (if they actually worked). And also we aren't going to magically reverse Type 1 Diabetes, but that doesn't mean everyone who doesn't have it shouldn't have a decent diet instead and instead eat like pigs and then get hooked on pills until the day they die.