I'm not an idiot, I know what the foam is for. Tyre Review on YouTube already showed that the PS4AS is noisier than tires like DWS. And it was shown that both these tires had more rolling resistance than some other tires.
I was saying that the PS4 is already a noisy tire subjectively, so I was curious if Tesla added foam to it, or just used an off the shelf tire, because it would change the perception of the car if people were expecting/comparing to the car's behavior with the OE tire. Many people already mentioned that swapping out the OE tire resulted in a 5-10% loss in range, so that's why i mentioned the weight and rolling resistance.
But like I said, I personally don't care, since I would've swapped out the OE tire for either the DWS or PSAS4 anyways, but others may care.