Alright I see your point. Might not make a huge difference per investor, but as a whole it does.
IMO curators are also much more likely to keep their Steem powered up than authors, so it would make sense to have a larger part of that pie go to them.
Makes sense, yes. Because it affects their earnings. For authors it mostly doesn't (it does buy influence so authors can promote their own posts, but established authors don't really need this).