... all of whom pay kickbacks. Meaning you get less car for your money. And even if you're one of the ones who plays the dealerships against each other, that's just to reach a reasonable price, not get a deal.
It's not like Tesla is trying to put the indie repairman out of business, they're trying to sidestep the big car companies' control of the industry even in the distribution side.
I live in a small city. There's probably 25 different auto makes sold by at least a dozen different dealership groups in my area.