Perhaps it’s more accurate to say that they don’t have a unique skillset. You’re right that someone does need to delegate, organize, and decide, but the ability to do so isn’t special at all. You could probably put any given technical worker in that position and they’d do just fine too.
Experience of course is what really shines here, but the problem is the same as politics. They may have more experience, but the decisions they’re making aren’t for everyone’s best interest. They’re biased towards the newer, richer friends.
This experience vs corruption duality is tough. It’s also there when you have the government making policy. The experts you want to consult on how X is made and what regulations there need to be are those who are experiences in making X – but those same groups also want money and clout, and will try to get that into the regulations. I’m not sure what a good solution is.