This is a problem where historians look at what they're saying more as being a part of a continuing debate, where they can say revisionist stuff to sound more original in their field, with an understanding that their interlocutors will know the basics. There are many ridiculous views in public which form when historians effectively say "for a long time we have been thinking A <the basic thing about the subject>, but on the second/third order, if you look at it sideways, in some cases B". The whole part besides B gets cut off, because people stopped actively writing A 50-70 years ago. Now A is completely boring and passee and even suspicious to younger audience. But B can serve as fodder for video essays, tik toks, blog posts for us ancient peoples etc.
I think this might also explain much of WW2 revisionism. Of course knowing that especially for this period it can be ideologically motivated in some cases, and in the extreme can lead to someone like David Irving. This also isn't new.
Also, in general if a field of scholarship advertises consensus more than sound dispassionate methodology, then of course various randoms will think of having their own "consensus" because why not.