Fair point. I guess by smart I'm thinking "least work for best grades" but that's a very loose definition.
Also - it's a very small sample size. And if I look more broadly... 2 of the seemingly "dumbest jocks" I knew in college went on to become doctors, one at the Mayo clinic. So perhaps their intelligence was showing in other areas until they got out of school.
Similarly, one of the 'dumb jocks' from my high school just graduated with a PhD from Harvard, which means humans are awful at estimating the intelligence of others.
Or, you know, someone obtaining a PhD breaks the "dumb jock" mould without necessarily being more or less intelligent whomever it is that you are referring to.
Also - it's a very small sample size. And if I look more broadly... 2 of the seemingly "dumbest jocks" I knew in college went on to become doctors, one at the Mayo clinic. So perhaps their intelligence was showing in other areas until they got out of school.