Ambition: Why do we care?

This post isn't an argument for ambition being a bad character trait by any means but I actually think a lot of us don't value ambition probably as much as we think we do. Firstly, let's define ambition. From my perspective, I perceive it as someone who is looking to progress in their career and achieve big goals. Actually, it doesn't necessarily have to be career driven but I think ultimately it is about achieving accomplishments that your every day human doesn't.