The only real conflict of interest is that dealer service centers are often the profit centers of most dealerships, so a 50% maintenance cost reduction[0] will likely translate to declining revenues for the dealerships.
Tesla claims they operate their service centers at cost and the goal is that they are explicitly not a profit center. This is why so many dealerships are disincentivized to sell EVs however. Less maintenance (due to less physical moving parts. No fan belt, no fly wheel, no alternator, no pistons, etc) means less service that can be marked up. The recommended service on tesla's best sellers (the model 3 and model y) is only every two years.