It's possible you might adopt a different attitude if one day you're diagnosed with rapid onset Altzheimer. At that stage you'd be forgiven for muttering 'basic science be blowed'. Keto (or whatever) offered some relief for my friend Bill, I'll give it a try given it's my survival at stake.

Plate tectonics was suggested in 1913 and not supported (to put it politely) at that point by 'basic science'. It took until 1960 to be accepted. A paradigm shift was needed as Kuhn explained.

Meanwhile, this paper (2024) https://www.sciencedirect.com/science/article/pii/S127977072... 'Effects of ketogenic diet on cognitive function of patients with Alzheimer's disease: a systematic review and meta-analysis'

concludes "Research conducted has indicated that the KD can enhance the mental state and cognitive function of those with AD, albeit potentially leading to an elevation in blood lipid levels. In summary, the good intervention effect and safety of KD are worthy of promotion and application in clinical treatment of AD."