As someone who's mother died of a rare/poorly understood cancer after fighting it for 10 years and multiple experimental treatments, and met others in similar b

As someone who's mother died of a rare/poorly understood cancer after fighting it for 10 years and multiple experimental treatments, and met others in similar boats along the way (support groups), there are tons of niche medical conditions that science hasn't even bothered/had the resources to investigate. Is a beef-only diet a good idea for the general population? Probably not. Could it be ideal for people with extremely rare auto-immune conditions that have an allergic reaction to virtually everything else? Sure, and that existing doesn't sound crazy to me at all. I've noticed a trend where scientifically minded people tend to get hung up the "proven" at the expense of the "plausible", forgetting that everything they rightfully treat as proven once could have been dismissed in a similar manner. Real people in the real world have to make decisions based on nothing more than plausibility all the time, and I don't see why diet should be any different. Particularity if none of the "proven" solutions are working for you. Put another way, there's a difference between "the evidence says this is wrong" and "there is no evidence that this is true".