Tesla has entirely done away with dealership. They sell plenty of cars anyway. Outside the US dealerships aren’t always a thing either.

You’re overestimating the importance of sales people in the purchasing decisions of modern consumers.

Guide people around the show room, hand out brochures if asked, make an appointment for a test drive, help fill in the online car configurator, …

“The computer’s asking what rims you’d like. I’ll show you some pictures.”

“What colour would you like. I have a brochure here? You like red? We have a red car over there. Would you like to take a look?”

“You need financing? I’ll fill in your details in our software and see what the computer says!”

Honestly, I suspect some dealership wouldn’t see a significant decrease in sales if they replaced half their sales force with an app.