That's because, strictly speaking, there has never been a 22B rally car.
And because, strictly speaking, it has never been premium. The car is higher quality than the standards, but lower than the premium cars. It's some kind of missing (literally) link in between.
As for rallying, can I just point out that rallying is not about the surface. Rallying is done on any surface, from tarmac to mud to ice. And just because you do motorsports on a non-tarmac surface doesn't mean that it's a form of rallying.
Tracks like Chamonix, Eiger and Toscana are not rally tracks. They are dirt / snow tracks and they're meant for racing rather than rallying. The format is just the same as in the tarmac races: overtake your opponents and get to the finish line first. There is absolutely no difference.
Is that a symptom of PD being confused about rallying and don't know what they want to do with it? I'd say no, because it's not even an attempt at doing rallying. They know very well what they want to do: 2-5 laps around a circuit, get to the line first. That is the format that has been dominant since 1997.
Sometimes they explore other routes, in GT5 they did a bit of rallying with the course maker generated stages, which were actually about time rather than position. In GT6 there is the Sierra Time Rally, with its own special rules that are really only viable in the virtual world. The first two lunar missions are also a form of rallying.
Gran Turismo 1-6 is about starting at the bottom with a cheap car and working your way up from there. That is the basic formula. Over the years there has been various flavours added to that formula, such as Super GT, NASCAR and WRC. But Gran Turismo has not ever been about replicating those series, including NASCAR in GT5 didn't make it a NASCAR game, it made it Gran Turismo with NASCAR flavour.
If you want WRC, NASCAR and Super GT you're better off buying a dedicated WRC game, a dedicated NASCAR game and a dedicated Super GT game. Because that is not what Gran Turismo is about.
The format seems to be changing somewhat in GT Sport, but it will still not be dedicated to a certain real life racing format. The Group B recreations for instance is not about recreating Group B rallying, it's about creating an exciting regulation for the cars.
Fisherman's Ranch is not a rally track, it's a dirt track intended for racing, which means that it's wide enough for overtaking.
For those who wants narrow tracks for time attack purposes, check out my GT6 community page, I've got one or two of them that you might enjoy.