Some people just do not like it when they think they are displaying knowledge and it is pointed out they are doing the opposite.
It seems a common reaction.
I know things that on the surface contradict 'what everyone just knows' because I question everything, even things I think I know, and sharing that knowledge has resulted in similar reactions.
Myself, I am interested in finding out new concepts, and old concepts, and which are valid real things that can benefit a grower. If that contradicts something I 'just know' that is even better.