is there anywhere that Italo goes that Trenitalia doesn't service ?
Of course not, but it was a matter of fair competition between 2 companies both running high speed trains as a market service.
Trenitalia doesn't run Regional and Bus service because of a God-given right, anymore. They have to participate and win call for tenders in any Region for the privilege of running all subsidized Regional services.
But, since those services are subsidized, Italo has been rightly complaining for years because only Trenitalia's High Speed Division could sell high speed and regional tickets in a single transaction.