Is it too much of a reach to make a claim that due to our high starch diet compared to other hominid species our brains developed at a faster rate due to our br

Is it too much of a reach to make a claim that due to our high starch diet compared to other hominid species our brains developed at a faster rate due to our brains consuming a higher yield of the energy stored in polysaccharides. Therefore isn’t it imperative for a majority of paleo and keto oriented diet people to consume complex polysaccharides for their brains to perform optimally? *with the exception of people who must follow it for serious health reasons