Blame Yourself

"Well, there are a few possibilities. I thought about the potential fail safes the flagship could have, there could be a sudden activation when a human was killed with its abilities. After all, Shield Cross Stars would have a vested interest in making sure their Officers weren't corrupt, and an even larger interest in making sure that if their flagships ever ended up in enemy hands, it wouldn't be able to turn against them. 

"Of course, that ability's scope and range would have to be limited, or else there would be too many checks and balances stopping the Shield Cross Stars Officers from doing their duty. So, the number of humans that could gain such protections would likely be limited to the nobility, which is why he would have to send his son.