Cadillac (and other auto manufacturers) structure their program to include dealerships, rather than to cut them out. The sale gets booked against and delivered by a local dealership, rather than Cadillac the manufacturer.
Tesla does not have an independent franchise/dealership model, and all of their local presence is corporate owned. This is what all the automakers have been against, as there are a rats nest of local/state laws that require legacy automakers to not compete with/cut out their dealerships with direct-to-consumer sales, but Tesla has avoided that impediment by resisting having to adopt the sales framework the legacy manufacturers can't legally get out of.
That said, manufacturers would love to be able to adopt Tesla's model; dealers are the ones that hate it as it's an existential threat. Manufacturers are only against Tesla's model to the extent that they're not legally allowed to adopt it, so consider it an unfair advantage.
Tesla does not have an independent franchise/dealership model, and all of their local presence is corporate owned. This is what all the automakers have been against, as there are a rats nest of local/state laws that require legacy automakers to not compete with/cut out their dealerships with direct-to-consumer sales, but Tesla has avoided that impediment by resisting having to adopt the sales framework the legacy manufacturers can't legally get out of.
That said, manufacturers would love to be able to adopt Tesla's model; dealers are the ones that hate it as it's an existential threat. Manufacturers are only against Tesla's model to the extent that they're not legally allowed to adopt it, so consider it an unfair advantage.