"Smart" also can have a lot of different meanings/outlets/vectors.
First 10 years of my career, I felt bearded Unix Sysadmins were the smartest people I knew :->, whereas I was fully Dilbertian in view of The Evil Pointy Haired Management.
I've been trying to develop "PeopleSmarts" or "Soft Skills" or "Emotional Intelligence" or whatever we call it last 5+ years, and it's... just as much harder and more challenging than technical skillset, as my mentors always told me and I never believed. It's a far fuzzier, squishier, less certain set of problems, and there just isn't O'Reilly-quality literature out there :P.
I have confidence that given time I can learn technical concepts or figure out technical issues.
I think path in front of me to be soft-skill-savvy, emotionally intelligent, is going to be long and hard.
So, how to properly setup LUNs on AIX or optimize a SQL statement or design an ERP architecture is one kind of smart; how to work with your own team to figure out productive way forward is another kind of smart; how to work with client and business and management stakeholders to satisfy their actual needs is another important kind of smart.