Great listen! To expand on what you said I would like to point out one argument that you made which is probably only partially correct. It is not strictly true that highly intelligent (or even knowledgeable) people are more confident about their decisions than the people on the lower levels of the spectrum.

There is a saying that goes somewhat along the lines of "The more you know the more you realize you know little." This saying is a bit misleading because there certainly is a point where gaining expertise in an area makes you significantly more confident about what you know and the decisions you subsequently make. But the inversion of the saying holds fairly true: "The less you know the more you think you know".

This phenomenon has been observed in psychology and is fairly well documented. It's called the Dunning-Kruger effect and is related to illusory superiority. The idea is simple: people of low skill or merit have a cognitive bias of being superior. Similarly, highly-skilled people suffer from the biases you have mentioned: they underestimate the difficulty of tasks etc.

The original study that examined this phenomenon gave the participants tasks (e.g. logic problems and grammar analysis) in order to measure their performance and compare it to how they perceive themselves. So while this effect is closely related expertise in a field it also holds fairly true in the area of intelligence/IQ.

For this reason I would argue that (interestingly enough) these two groups are both dangerous for the same reason. While, as you said, one of them is certainly more respectable, they both suffer from similar biases.