Ah yes, the age old tactic of “if you don’t agree with me and manage to refute my points, you’re being mean to me!”
Also on the subject of dbgt, akira toriyama did indeed sell the rights to dragon ball, so yes, by your logic dragon ball gt is canon, even though it was not to the original writers intend.
I wasn’t being glib when I said “canon” is a fanmade idea. Before the late 90’s it didn’t even exist as a concept.