No, not the excitement, the idea of sending your own players away to develop instead of developing them at your club.
What would be the alternative? We can't play every unproven youngster to develop them, not to mention that only ~10% of them turn out good anyways (at every club in general). That would be not only ridiculous but significantly harm our results, we'd never be able to win titles that way, not even the oh-so-weak Serie A.
In most cases, the youngsters stay at an environment they know and are comfortable in as well, e.g. Rugani, Berardi, Zaza, there's no danger of moving them around too much in unstable conditions. And in other cases where the player's talents are deemed good enough we've shown that we will make exceptions and let them prove themselves in our first team, just take Pogba, Coman, or to a certain extent Mattiello as examples.
I'd say the only case wher we've defenitely made a mistake was Giovinco.