I think Suzuki may well have been better for him in terms of being competitive but that is where money very likely did come into it.All of which ignores the basic fact that Yamaha doesn't direct Michelin's tire development. Many would argue that Honda has greater influence over Dorna (and thus Michelin) thus swings matters Marquez's way.
Personally
Sophistry/nonsense maybe. It is also NOT what my post said. Nowhere did I argue that the Ducati was a better bike than the Yamaha.
But that also doesn't mean all the Ducatis can be lumped in together. The GP7 was a very different machine from the GP11 which in turn was very different from the GP15.
A different cost-benefit analysis applies to each. So where Lorenzo might have been willing to give a GP15-type machine a shot, he'd never make the same jump if a GP11-type machine awaited instead.
Point being, his prospects for the next two years have definitely taken a downturn over the course of this season i.e. after his Ducati deal was sewed up. And in retrospect, the still-improving Suzuki might have been better suited for him.
Ironically, his loss... is Iannone's gain.
Your narrative also ignores direct quotes from Jorge after winning his 3rd title to the effect he was proud to be in the company of other triple title winners for Yamaha in KRSR, Lawson and Rainey, and that he wished to retire as a Yamaha icon like them. It is disingenuous to pretend that it his attitude to Yamaha rather than Yamaha's attitude to hiim which has prompted him to leave, or that Yamaha have not been influenced by their view or preference as to which rider will be iconic for them in retirement.
As far as tyres, Jorge and presumably Yamaha have managed to bring influence to bear on Bridgestone in the past for Jorge to be provided with a suitable high edge grip tyre, and while Honda may well have more influence than Yamaha, Yamaha have much more influence than Jorge does as a departing rider who supposedly stole last year's championship from Yamaha's favoured rider, and whether or not this is true or Yamaha thinks it is true that is how he would seem to perceive he has been treated, with some justification imo. As I said, who else do you think is going to push for a tyre which mainly suits Jorge? As I understand it, and I do get confused between the front and rear Michelins, Michelin originally had a tyre which suited Jorge fine, as pre-season testing showed, which was later withdrawn, possibly and not unreasonably because of tyre detonations for Ducati riders. A non-detonating tyre with otherwise similar qualities does not seem to have materialised however.