I was talking about it in a specific stadium that isn't legal for use due to being absolutely ridiculously unfair to most things. Ball tips happen to do well in it. Try reading carefully.
Any other time I've mentioned/recommended a rock combo, it's always prefaced with "Not competitively viable but interesting/the best thing you can make with those beys". Do you honestly think I'd deny rock being good if it actually was, considering I've got pretty much every MFB part?
Last I checked, we only KNOW things through rigorous scientific testing, not the opinions of children.
That said, feel free to attend a tourney when one is organised in your area, and use the rock combo. I'm sure the serious bladers won't mind the easy wins