Unfortunately, not-yet-the-worst that could happen is this:
https://aviation-safety.net/database...?id=20071028-0. One way of evaluating a procedure is to run a study of what happens if not-followed properly or mis-applied.
G/S intercept from above was a mandatory item in Toulouse check ride a while back. Wonder why they decided for it? If the car is dirty, wash it. Painting it over rarely brings satisfactory results, even if the new colour is more fashionable.
(Out of airspace necessity I've become fairly proficient with both techniques as per each manufacturers' recommendations. Coat, hat and back to my continent)