Ruin Explorer
Legend
I think this episode was pretty clear that it wasn't that they "didn't" train them, it's that growing up in the Red Keep, in King's Landing, around the court, prevented the Hightowers from being able to train/teach them properly, because they were continually being subjected to countless "bad influences", as it were, and as princes, weren't really subject to discipline from anyone but the king himself, who was either unwilling, or unable, to really engage in it. It's not exactly surprising or unheard of - countless wealthy and powerful individuals in history have attempted to groom their heirs for succession, only for their heirs to become arrogant, psychopathic, dissolute and/or wilful (c.f. also Affluenza). Indeed, it's so common it's almost a given. As someone who went to one of the "best" schools in the UK (ugh, wish I hadn't, didn't even get me that good of GCSEs) and has friends from Eton etc., I can assure you, it is very much a real thing, too. Incredibly successful, wealthy, powerful parents often are unable to make their children into anything but, well, wankers. Particularly if those kids are raised around wealth and power. It's not 100%. I don't think it's even 50%. But it's a double-digit percentage.Alicent and her father spent their lives trying to get their kids to rule, and appear not to have trained either to do so, which seems really odd, especially for her dad.
They make a specific demonstration of the difference here, where Alicent asks Gwayne about her other son (who is 16), who wasn't raised at the Red Keep, wasn't raised in main court, but was instead mostly raised in the Hightower court, and is a kind and decent and normal 16-y/o instead of either a dissolute loser, or a raging psychopath.
Hearing that he turned out okay is a big emotional moment for her.
This was an interesting episode because it seemed like it set up an awful lot of stuff that's going to pay off later.