We are sometimes short-sighted. We never had to plan because our security was always assured. We survived with little effort and thus did not think enough. I note your ideas have evolved - the assertive idealist is now more of a pragmatist. Self-analysis is one.
Nobody wants to listen to an egoist.
The Chinese say hide your sharpness, you'll still be sharp. I listen to incisive, honest feedback from well-intentioned colleagues and friends with good minds. I'm not a glory-chaser any more. I've earned as much as I deserved. I observe others.