Buckle wrote:-
"My dad died in 1966 at the age of 35 from it. It is a debilitating disease. It would be wrong to suggest that doping is responsible. Lomu was a game changer and an outlier. In order to compete rivals had to dope. Therein lies the problem."
It is not wrong to suggest anything if the evidence is there even if it's just a tiny, inferential scrap. What's wrong, generally, is to presume someone is doping or clean even, without any evidence. Time and again ostensibly clean athletes with a squeaky clean public image turn out to be dirty. Carl Lewis would be an example.
Personally, I don't believe Lomu did dope. Equally, if it became clear later that he did, it would not surprise either.