Sorry am probably getting a bit deep for the pub. I do get what you mean. But I also agree with StillLost. Just a thing I've been realising recently about words, but perhaps unhelpful for this discussion.
I would say for me the "candy crush and Jezza Kyle" thing is unthinking rather than stupid. As in being something that you choose (or if you like a lack of action/choosing) rather than a trait you can't help.
I don't know. I am clever in an intellectual/academic way. And I do often get frustrated at the lack of "mental horsepower" (great expression :)) in general in the world, and I suppose that it's only really recently that I've realised that I do have more of that power, if you like, than a lot of people, which is a bit of a shock because as you grow up, there are always people, (ie adults) who know more things than you, and it's jarring to realise that you have overtaken the majority and that although there are, a great many people still cleverer than you, that most people you meet aren't any more. I also have times where I am completely irrationally annoyed that people don't know everything that I know. (Even stupid stuff, like every time there is a thread about rear facing car seats somebody, or several people, say "But where do their legs go?". Now I know that they have better things to do than to have read every car seat thread ever, and it's a perfectly valid thing to wonder about, and that they may well not have come across it before as their DC are younger, but my mind just yells "People have said this like a hundred million times, stupid! Google it or read an old thread! Gah! How can you NOT KNOW that?" And so I have been known to think or say things about "The stupid" in general. (Fucking dress photo thing almost broke me.) But if I stop to think about it it does make me uncomfortable.
I think I have tried to relate to the point and also make a point about words in the same post and it hasn't really come across or been relevant. And then I've just done exactly the same in this thread. I also need more sleep :)