And when that happens, who is running the Kingdoms? Jon, who is another Targaryan? Yeah, that's going to work out well. Ask Ghost about his loyalty to his subjects.
I think the point is that life is cruel period. The men want to use this weapon of mass destruction for their own purposes and when it is good for them, but then they want to put it on a leash and shame it into good behavior. At the end of the day it do what it do.