My logic is that if you increase the Curation incentive then there is more Curation and Authors don't need to rely on Vote Bots so much to get exposure.
I guess there will always be vote bots and they are including some standards recently like post age limits (to ensure bots are used for promotion rather than profit incentive) and some bots owners are also doing blacklists and applying some post quality filters. So in a way this is a form of curation but I do think it goes against the spirit of the systems intended decentralised design.