What's wrong in the world of notation softwares?

I was genuinely worried that I would sound snobby if I questioned whether anyone used GuitarPro in a professional context, but then DT said that “jazz musicians probably use some chords diagrams taped on some wall”. Now I’m much more at ease, really.

I would say that you’re complaining that a certain tool, which you admittedly cannot manipulate to its full extent and potential, cannot fully concentrate the whole of your workflow, which is frankly an unreasonable demand either way. Some people sound like they’ve been forced at gunpoint to buy the software. Jeez!