It seems that you’re starting from the point of a non believer thinking this is just a merkrting scheme.
I can tell you first hand it’s not. Every corvette model, civic Type R, BMW M, Ford Mustang GTD, Hyundai N, AMG and so on with Michelin spec tires are tailor to the specific model. The Michelin process is unique and only 3 facilities of all Michelin can do it. The hours of engineering dedication from both sides in significant. I can walk around my site and tell what tires are what spec from a distance even when over 70% of our Production are Pilot 4S
I couldn’t find a BMW video but this Porsche one explain the process in detail.
PCA spec tires