[solipsist]

  Being a better speaker doesn't necessarily mean your ideas are going to get worse.

In your essay, you say:

  Being a really good speaker is not merely orthogonal to having good ideas, but in
  many ways pushes you in the opposite direction.

Paraphrasing the above passage, "being a really good speaker ... pushes you in the opposite direction [of having good ideas]".

These two statements seems to be in direct contradiction of each other.

[pg]

No. It just means you have to expend extra effort.

[solipsist]

This is interesting. So you think that being a good speaker negatively impacts one's ideas, although it won't necessarily be noticeable to others? That is because those who are good speakers have counteracted the negative impact with more practice.