I guess you have attacked some max th11 player who left his progression base as active or some worst design I could imagine of. Max th11 includes max walls defenses heroes and cc and No th9 can ever 3 star against that base. Share your replay of beating max th11 players in fandom I hope you know to upload a video in here
The original post has mentioned about th9 strategy and you made a point that with that th9 strategy you can beat th11 and below. You never mentioned using that strat at th10