Something doesn't make sense here, both aluminum and CF are bought with money and CF is extremely more expensive and harder to get a hold of(true aero quality 60% or higher carbon content) with boeing and other aero companies getting first dibs because they buy in massive quantities and pretty much set the demand for it. Aluminum is easy to be had and can be made to whatever spec you need by alloy and hardness. Now if he said Italy/Ducati lacks the ability to do anything with that aluminum from a manufacturing standpoint I agree but they are going to find themselves in the same boat as Lamborghini trying to fool around with CF. It isn't cheap and Lamborghini were smart enough to team up with Boeing who are a true leader in manufacturing anything made of CF, instead Ducati have chosen to either tackle this problem on their own or they may be in with Ferrari who I seriously doubt have anything of use to offer.
Just repeating what Suppo said. The Japanese were probably not happy to see Ducati introduce carbon fiber chassis components b/c titanium frames have been banned for a long time in the name of cost and safety. Perhaps Suppo was giving a bogus explanation so they MSMA would stop hassling Ducati.
I'm inclined to believe him though b/c CF is a lot easier to experiment with. Suppose Ducati want to make special aluminum alloys. They need an experimental foundry for Ducati Corse or a really good technical partner. If Ducati want to experiment with CF, they only need to buy an oven, buy the CF weaves, then hire someone who knows how to cut, assemble, and bake.