I agree, most people are both content creators and curators. High curation rewards are good for both content creators and curators. Curators get high rewards so that's a given. Content creators will be able to grow an audience and following more organically because of a greater desire to actively curate content.
A lot of people blame the growth of bots on greed. That's a part of it but there are other reasons such as lack of alternatives to earn using stake. Delegating to a bot returns more than 3 times curating. Delegating to a bot requires almost no work, using 10 full upvotes a day takes time and effort. Curating makes very little sense when the rewards are so low.
Another issue is lack of alternative promotion. Content creators buy votes because there no other viable ways of promoting content on Steem. Steemit promotion is a waste of money. Steem.chat and discord are quite ineffective. Frontends should offer some form of promotion. It'll help them raise revenue and it will lower demand for bots if it's done right.
Increasing curation rewards has been talked about for over a year. Even most witnesses agree it's a good idea; @cervantes conducted a witness poll a few months back. I think support is even stronger if a separate downvote pool is created, which I also agree with.