Just because the person controlling the game doesn't interact with the game(steering wheel), the in games physics can be simulated with accurate performance. I would still enjoy iracing with a controller...
I've not said that the physics can't be simulated accurately. Obviously they can. That's not the problem, if you'd bother to read my posts. The problem is interacting with the physics meaningfully; in short, control.
So I take this that you're suggesting then that a console controller of the standard type that is available with your Xbox/Playstation is suitable for a serious motorcycle simulation. Interesting.
How do you bind the controls for this? Do you have the left analogue stick as turn left/turn right, or do you more accurately simulate the fact that when you turn a motorcycles handlebars to the left at speed the bike goes right? How are you controlling weight movement and tucking, right analogue and two buttons for moving your CoG in three dimensions? How are you controlling riders getting their knee down or not? Are you making any effort to provide force feedback or other information to the rider, or are they doing this purely visually? Does the player have to make any attempt to balance or is it all assumed skill?
Or is all this being done automatically, and you've basically recreated Ride/MotoGP/Superbike/Tourist Trophy? Why are those games insufficient for you?
I think you want someone else to solve all the problems for you and magically hand you this hyper-realistic motorcycle simulation that somehow manages to accurately translate the fairly complex task of riding a motorbike fast onto a generic controller. While ignoring the fact that if it were that easy, at least one of any of a number of companies that make semi-simulation motorcycle games would have progressed to that point by now.
We have highly accurate aircraft simulations, but you cannot seriously engage with one using a console controller alone. The controls are too complex. At minimum it requires a keyboard, to be anything approaching realistic flying requires a specialist controller, a HOTAS joystick/throttle set. A motorcycle has less explicit controls than an aircraft, but the complexity and need for substantial analogue control of a type that no current controller provides, along with feedback that is difficult to convey means that this is not a trivial problem. It can be solved, but I have doubts that it can be solved at a consumer price point.
This is not consumer grade. But you need a motion rig to really be simulating riding a bike, it's basically central to the experience. Anything that removes that is not really a simulation any more, it's remote control bike racing. Which exists and might be more what you're looking for.
Physics guaranteed to be absolutely realistic down to the last quantum. Played using a simple controller of a type you'll be familiar with. Safe, relatively cheap, competitive if you want it to be. It's just not real bike riding, just like what you're asking for isn't.