Nothing to do with Bridgestone being a Japanese company that strikes deals with car manufacturers. I'm not saying bridgestones are bad but just because they came standard means very little.
A good while ago there used to be 2 tyre companies in f1. Michelin and bridgestone. Bridgestone where favored by Ferrari even though the Michelin tyres where better. Bridgestone then got the sole rights to be tyre supplier for f1.
Why does Renault recommend elf, Porsche Mobil 1 and so on. Why not fuchs super slipperly titan goalith race s type R oil? Sponsorship and business deals.