Most pet hypotheses of researchers are informed by actually knowing about the disease, and not disregarding things such as 1) years of schooling (protective) 2) early onset alzheimers (genetic) 3) APOE2 (protective) 4) APOE4 (higher risk) and the multitude of other factors.
Basically, if you’re going to make a claim and not be some armchair scientist, you need to not Dunning-Krueger yourself. I’m not saying you have, but the way you’re representing yourself suggests you’re at risk of it