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Unfortunately being a good programmer is not the same thing as being a good public speaker -- unless the speaker is already known to have given good technical talks it's risky to accept. And since most CFPs are blind you can't make that assessment.
I am not trying to argue that technical talks are bad, just that they are more frequently done poorly than other talks and are risky to accept for that reason.
I also think that it's rare for a technical talk to actually benefit from being a talk instead of a blog post. Of my own talks, the one I gave at Rustconf 2017 is one of the only ones that was actually better because it was a talk. Most of mine could have been blog posts
Yep, I hear you re risk, the CFP perspective, and orthogonality of expertise/speaking skill, and agree on all counts. That said, I *also* think there might be workarounds to encourage more (safely acceptable) talk submissions in the vein I'd like to see.
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