Yes that is true but I think the benefits outweigh the negative aspects in terms of dilution but that is a subjective matter I think.
I guess that's basically the idea of delegated curation, which has been discussed in the past and may already be in the works.
Yes if we had that then it would be less necessary.
Edit: Indeed if we could get delegated voting working and combine that with a list of elected super curators who get at least a proportion of that then it could work very well. You would still get favouritism and people giving their power just to people that they know but the overall effect would still be better than the current situation.