Its an improvement to you but a lost sales opportunity for the dealer.
Im surprised this isnt mentioned more, but dealers make a ton of money pressuring people who come in for maintenance to get a bunch of other stuff.
According to NADA in 202 49% of dealership profits came from the service and parts department, 36% from new vehicle sales, and 14% from used sales.
Service and parts averages 60-70% profit on the transactions.