I don't say this to be rude, but only factual to my own experience purchasing a Model 3 last year. I actually found the phone reps to eventually be more helpful than those at the sales center where I planned to take delivery. The delivery center folks, I would be shocked if they're commission, because there was a general malaise at best and usually annoyance if I asked a question or had the gall to think a returned phone call or text within 48 hours would have been reasonable.
I guess my takeaway was that Tesla has very little interest (or ability), despite selling cars to plenty of people with higher expectations (and usually incomes and/or net worth), to invest any more than they absolutely need in their sales operations on the ground.
My experience was literally the polar opposite of going to an ordinary car dealership, where the creepiness, dishonesty and overall antiquated process was replaced by people who cared and did as little as possible and seemed to be not at all supported or cared for by the company they work for. With that assuming the compensation correlates. Maybe Wall St right now loves Tesla's ability to keep sales and operational costs low, but this approach is what will cause the company to eventually hit a wall with many consumers who are used to their Honda or Toyota dealership at least acting like they care and managing follow up when needed.
My experience may be out of the ordinary, but seems in line with others who went the same route.