Depends how much value a person places on the real or perceived level of service or comfort from having a "local" dealer. Those that place a greater value on it are typically those that don't or can't do their own repairs. Those that place a lesser value on it are generally those that can and do perform their own repairs.
The dealers cater to the folks in the first category, because they will also generally keep coming back after the warranty is over and the dealer will make money off of them.
And there are some who say "dealer? what's that?" I fall into that category and I bought a tube of dicor at one once and a couple random parts/widgets that were camper specific before I had Amazon prime, lol.
I the almost 30 years that I've been of legal age, I/we have bought exactly 4 vehicles/RVs/toys from a dealer.
1 new truck, situation was right. 1 new car, 2 year old leftover deal over 25% off msrp. 1 used truck with a trade in, somehow it was a rare good deal, think they made a mistake honestly. 1 used snowmobile, hard to find model that I really wanted and wasn't overpriced.
Average, I buy something from a dealer once every 8 years apparently and 9 out of 10 purchases are private party used. Just how I roll because of the $ value I see in doing it that way.
Others perceive value differently.