Adults tend to repress their pleasure. Sad to say, I think we become adults only through disappointment, grief, and lies. So of course gradually we become tough, less sensitive.
What better reward than to see others excited by your work?
I think it is better for societies if no one dominates forever.
But as you say in English, c'est la vie!
I'm [going] through a mystified period of my life, where the more I learn, the less I know.
All I have is an opinion - I don't deal in Truth.