2. The marketeer
There is usually little to no overlap between the two groups.
There is also little to no overlap in their goals.
As far as I can see, they also don't usually see the need to do so.
A few go so far as to express complete disdain for anyone non-technical.
Failure to absorb the content is put down to a disability of the audience, not the quality of the speaker.
The chosen topic itself is explored in minute details, often with wall-of-text slides.
They are absorbed by connecting, no matter what.
They will never express disdain for the audience, but will sometimes disdain real complexity of the topic.
Failure to connect is put down to a disability of the audience to muster enough enthousiasm, not the quality of the speaker.
The topic is presented in broad strokes, often with colourful images.
They need a different skillset as they are both gripped by their topic, but want to connect their topic TO the audience.
You need to be sufficiently informed to be able to answer and sufficiently robust to be able to say "I do not know".
You need to be intellectually honest and able to simplify topics without dumbing them down.
Honing the last ability will do wonders for adoption in the long term, even if it means telling people sometimes that adoption is not a good option for them right now. People remember that.