Few people know what they are doing with PowerPoint they produce a set of cards or stepping stones, then gives these out as hand-outs.
But where is the narrative, the building of the argument of the nuanced slowing down or speeding up to change emphasis - let alone the question from the floor, or the adhoc additional thought.
Visuals in a presentation should compliment what is said - one would be far weaker without the other.
Very, very rarely when I have attended a conference or lecture I have received a handout that is, give or take (though the presenter didn't read from it), the notes they used to talk the audience through the images.
When someone says 'there is a handout' and provides copies of the slides that is ridiculous.
It is like being in a train looking out of the window while someone is talking to you - you want want they said,not what you were looking at.