The domestic league doesn't give a flying fuck about us - they relegated us, and constantly bend the rules to fuck us over.
Italy is a bureaucratic fascist country with tons of red tape and resistance to change, and this is exemplified by the rapidly regressing domestic league.
Old stadia, bickering obsolete owners, terrible infrastructure and tv coverage. On top of that, they don't even like us, so why should we care about them?
Yes, we need to keep playing in Serie A, and I'm sure that's what Agnelli and Co want, but we also need another product that will grant us greater exposure and make us relevant on a global scale. Serie A isn't it. Apparently, the CL isn't it either.
If we have to choose between Serie A aka The Domestic League and a Super League where we make more money and play games against quality opponents, then fuck Serie A.