If you raise the bar for being allowed to speak about a very real concern that high, nobody will be left to spread and debate the idea in the first place.
geohot's not a regular joe, he's founded multiple companies and is a leader in our community. This is like a general being like "why are you letting the enemy win?" while he sits comfortably in his study managing his cigar collection.
I still don't think it precludes him from having this opinion. Could he be doing more? Sure, but having found success in this system doesn't make his criticisms of it invalid.
I agree with OP, who to my mind hasn't said the so-called critique is invalid or that he's not allowed to have an opinion. Isn't the comment along the lines of "well, what have you actually tried to do? You have resources, standing, kairos, etc." Seems one of the more perceptive critiques on here.