I get that but besides optimum I have used other coatings from various manufactures ranging from cquartz, gtechniq, 22ple, adams, shine supply, gyeon. I may have missed a few more but Optimum is the only one to have stated this. Take 22ple for example as they don't even have any polishes in their line up, excluding their primer polish that is deemed optional. They don't come back and state one must use their polish products if the coating has low performance. I have not heard the others I listed state this either. If anything it comes down to the application of the coating itself where user error comes into play.