Why not? The Model Y Performance PUP is closer to those cars around a race track than the SUVs you mentioned. Even if most Ferraris and Corvettes can't keep up with a Y for one lap around a lot of race tracks.
No, when you buy ANY vehicle with 35 series tires in a non square configuration it's intended purpose is to haul ass on a dry, twisty road.
It's really easy. Either order a LR AWD or buy some 19" wheels and tires. It really doesn't matter if the dealer carries those as you can buy better alternatives for less money from the aftermarket anyways. Maybe Tesla will carry winter wheel/tire sets for the Y in October, or maybe they figured out they weren't selling them because most people chose better alternatives. Both Martian and Tsportline carry better wheels for less money than the factory options. Just buy some 19" Martians and some good all season tires and sell your Ubertines, or better yet have a seperate set of wheels and tires for winter.
I honestly don't understand your conundrum. You have to take some responsibility for understanding something so simple as what wheels and tires an expensive car you're buying comes with. I get that Tesla doesn't mention the P model comes with max performance summer tires, and they really should. But the consumer should also take the 5 or 10 minutes required to do a little bit of research. A quick search at Tire Rack shows that winter tires don't exist for the Model Y Performance PUP.
The conundrum is this: no other SUV that I know of from a high end manufacturer comes with summer tires ONLY in their most expensive trim. Maybe some specialized trim, but generally it virtually does not happen.
Just because it's faster than your mentioned Ferrari and corvette, it does not mean that this is a specialized track only car or summer only car. The general target market for those cars (Ferrari especially) is quite different.
Who tesla competes here with are the high end SUV manufacturers and not ferraris. There is a certain level of expectation when I am purchasing an SUV. That expectation is that I can take the car into less friendly areas that I would a car. Higher clearance for snow, hills, etc. If you are playing in that market and wish to do something that is outside of the expectation, that should be clearly said in big bold letters. For example, when you select the performance trim and mind you this is not a downgrade, but an upgrade of only two available trims, with no way to chose a different wheel / tire setup, you need to explicitly disclaimer that "you are taking high risk driving the vehicle out of the dealership in snow, or low temperature, that may result in an accident or death" - general expectation is for an SUV to be equiped with proper options to take advantage of the intended purposes of the vehicle.
Its akin to Ford F150 SVT coming with summer tires and inability to tow. The decision process in that regard is mind boggling and outside the norm. No, it's not normal to buy a second set of tires to drive an SUV out of the dealership in 40 degree weather. No, it's not normal for an SUV to not be driveable in 2" of snow right out of the dealership.
Give an option to choose all seasons / summer or put an effing disclaimer on the website before somebody kills themselves. I know of not a single person that goes into the dealership asking for a supercharged range and in the same breath asking if they can drive it in snow or below 40 degree weather. Call a spade, a spade. The company is not going to get better through placating bad decisions.