No, he's not wrong, but what is wrong is that there was anything against the rules about it at the time. That was an era before spec-tire rules and designated tire suppliers. It so happens that Michelin had their factory in Europe, within overnight-shipping distance of all the European races (i.e. most of the series), and they did that because they COULD. Bridgestone couldn't, because their factory was in Japan. The top sponsored Michelin riders benefited from this. That would have been Rossi.