You're proposing that there is something chivalrous about choosing to stand for something, to protect something, to care because it's important. The sense of transcending the self, which you have spoken to in the sense of being in service, in the sense of being in duty, in the sense of stepping into a new space to provide opportunities to oneself and to others.
All those different ways of transcending the lesser self, or the personal self, to a more transcendent self. Wherein, perhaps, what we are sensing and exploring today, the chivalrous path, is one of the ways to consider the transcendent self.
It's actually to be responsible for the future of the human race - and you don't have to be a parent to do that. I think the chivalric extends to choosing the qualities in life you want to be at play, and to become responsible for that, and be a champion for that in oneself.