> Does having the right ideas really strongly correlate with having a talent for expressing them eloquently?
It's about the process, not the talent. When you've carefully thought through and refined an idea to understand whether it makes sense yourself, that usually provides a lot of guidance on how you can express the idea eloquently to others. You know the questions they'll have and the answers they'll find satisfying, because you already went through the same process. When you're just tossing out your first half-baked impression, it's a lot harder to communicate it well, although some people do have the orthogonal talent of making it up on the fly.
It's about the process, not the talent. When you've carefully thought through and refined an idea to understand whether it makes sense yourself, that usually provides a lot of guidance on how you can express the idea eloquently to others. You know the questions they'll have and the answers they'll find satisfying, because you already went through the same process. When you're just tossing out your first half-baked impression, it's a lot harder to communicate it well, although some people do have the orthogonal talent of making it up on the fly.