Basically, it's all nonsense. The film is better than the coating but the film will also get scratched and faded and need to be replaced. Since the cost of the film is the same as repainting the car, you may as well wait until the paint is ruined and then repaint it.

There isn't anything you can do to keep your paint brand new unless you inspect it 3 times a day and spend a fortune removing stone chips etc as you go.

Live you life man, it's just paint and it's just a car.