I think Shane's cue that you referred to (the one with his name inlaid) was a Joss with a Schon shaft but maybe I am remembering it backwards. As for the rest of your post, I don't get the point because the tone of it sounds like you are trying to disagree with me, yet you are repeating back to me everything I said and are in the strongest agreement. You are right in that if you are familiar with a cue you can usually play pretty well with it even if you don't like it and I never said otherwise. I do think a person will play their best pool with a cue they are familiar with and that meets their their preferences perfectly though (mostly because of psychological reasons like confidence). As for the rest of what you wrote, it just parroted everything I said to a T. Pretty much all cues are capable of consistent pool of the highest possible levels, and preferences are subjective.
He had a Joss cue that was custom made for him. He then took the shaft from that cue, and put it on the Schon butt that used to belong to his mother.
Where we are disagreeing is that there is an entire brand that hits like crap. If a certain brand of cue can have that kind of effect on your game, I'm not sure you're using the right end of the cue. It's the small part with the leather on the end.
I've played with Wallabushkas, and ran off a lot of balls with a nearly cracked ferrule and a super soft elkmaster tip. A cue is a cue. By your own remarks, every brand sucks. They can all be inherently good, or inherently bad. You choose to say Joss sucks, but other brands are good, You should just say "I have a mental barrier that doesn't allow me to shoot well with cues by Joss". That's a truer statement.