What I am about to say could be seen as intellectual snobbery. But - hear me out before you report my post as an Ad hominem attack.
I think , even by his mother , H has never been thought academically clever. The 2 Ds, the lack of intellectual curiosity during school , the various reports he wouldn't pass the exams to rise higher in military ranks.
Now , I think being academic isn't a virtue, it's to some extent innate. I do think that higher education , does , even at the most ground floor level , teach analysis . Harry seems to base all his arguments on personal experience. Are they valid? I think so , but only if tempered with more thoughtfulness and deeper thinking. & this is why I think H gets annoyed when people question him , because he possibly hasn't got the tools to engage in a decent argument. So he falls back on "right?" in interviews or appearing to think that because of who he is what he says is worth listening to.
I may have explained that badly. To be clear there are other ways of being "intelligent". Some of the people I know who have done best in their careers don't have double firsts etc - but they have a way of dealing with people , street smarts , common sense , and a work ethic. So I am not saying intellect is the best thing , but an ability to see outside your own experience / bubble / is something valuable.