I was thinking exactly this (less eloquently, of course) when I saw your previous Are you an Expert? and The Bad Apple: Group Poison.
I.e. the Wikipedia theory is that criticism from a not-so-expert is, on the whole, better than not having them around at all.
But my own experience tells me this isn’t a universal rule. For one thing, having people of comparable abilities play together (e.g. chess) generally works better (i.e. advances their level more) than having people with very dissimilar abilities work together, while the latter is obviously better when the ones with higher abilities specifically focus on trying to teach rather than trying to perform themselves.