> I would bet on the mobility impaired people to win the cage match

Why frame it as a fight? There’s no need to start there; you don’t need to waste time fighting against people not in your group. You just need to establish group status. If the constituency of obese people is strong, why not seek to establish policy on behalf of obese people and not everyone? As the article and others here have said, reducing traffic congestion benefits everyone in multiple ways, including benefits for the people who still have to drive. Given a choice that doesn’t affect your ability to drive, I assume you’d rather have less pollution, less noise, and fewer other drivers on the road?

The other angle missing from your comment is e-bikes. Most of those ~42% of obese people in the U.S. are still capable of riding an e-bike, and for short trips in busy areas, e-bikes are more convenient and easier to park than cars.