Why is it important to say that a method you don't use isn't as good as one you do use? With speed cubing, there's two objectives, improve your own time and/or be faster than others. Getting people to use the method you believe is faster, which they don't agree with, seems counter productive. If people want to spend time on other methods, just let them. The only reason I think someone might argue against it, is if they're afraid it might end up being faster and they'll have wasted time themselves on an inferior method.