Substantially true, Jack is a waste of a good factory seat on current form, and his strong one lap pace is irrelevant if he can't make the tyres last more than a few laps.
I am a big Binder fan, and he is the one likely to keep me interested in the sport if he becomes fully competitive with Bagnaia in the absence of a competitive MM. I would love to see Binder become world champion, something I have never expected with Jack, and do expect may more wins from him as opposed to none from Jack, who is unlikely to even win in the wet given how good Binder is in the wet.
Some of the rest of what what you said is not true though, Jack won both in moto 3 and the premier class before Brad, and it is in fact KTM and Binder himself who have been saying Jack has helped with the KTM bike; I share your scepticism about the latter btw, perhaps they are just being nice to a likeable guy who won't be with them long term.