As great as a player Thurston was he is not a commentator or analyst in any way shape or form. Same goes for Lockyer and Lewis. Johns isn’t to bad when he is just breaking down a play.
Look, I agree that he needs a lot of work and there are definitely a lot of 'inferior' ex-players who would probably be shit load better in front of a camera than JT. This is a flaw in Ch9's talent procurement strategy. Great ex-player retires, give them a job. Fittler, Johns, Lockyer, Slater, Thurston, etc It'll be no surprise when Smith gets picked up at the end of his career - although he'll probably offer quite a bit, if he's allowed too. Probably the best of them from an insight POV in Cronk was already in the Fox stable due to his missus.
However, the point was more about JT bringing standard tactical lingo used by all coaches and teams into his analysis, and being shutdown immediately by other folks on the Ch9 panel. And I have no doubt Ch9 tell their talent to keep it dumb and simple. Yes, it's a simple game, but their approach over the last 30 years has cemented the it's just 5 tackles and kick bullshit we keep hearing as cop out for the game. The game has evolved in the professional era but the tactical discussion on Ch9 hasn't one iota. American Football is simply 3 downs and a punt, but the analysis by all networks over in the USA makes it sound like chess. And since networks have gone deep down the tactical analysis route, the NFL has eclipsed baseball as the #1 sport in America. It enhances appreciation for the sport.