I wonder what sort of problems you must have to get this upset about the creator of a particular software telling people how they personally use that software

Personally I keep open several tabs of CC but it's not often that more than one or two of them would be running at the same time. It's just to keep particular context around for different parts of the same application since it's quite big (I don't use CC for creating new projects). For example if I had it work on a feature and then I realized there was a bug or an adjustment in the same files that needed to be made then I can just go back to that tab hours or maybe even days later without digging through history