Yeah I know and I agree 100%. They can be beaten by others, but my point was that if they even went so far as to mentioned that only Oonoki, another Dust Release user, could beat him then that means Dust Release is very very very powerful.dust is mad good but can be beaten by non-dust users like how mu was beaten by 2nd mizukage. they are beatable by others but i think oonoki might have an advantage in this fight.
Plus, personally I don't think the fact that the 2nd Mizukage beat Muu downgrades the Dust Release at all. In my opinion it only puts emphasize on how strong the 2nd Mizukage was