Almost everyone says that he is an "excellent speaker."
However, the content and organization of his speeches and the quality of their prose are quite ordinary and unimpressive on the printed page - unlike the speeches of a Lincoln or a Bryan.
His speeches themselves aren't excellent - his manner of delivering them is extremely soothing and reassuring.
I think you have lulled yourself into a state of unawareness of the fact that you have made the author's point. This was the author's point.
“his manner of delivering them is extremely soothing and reassuring.”
That’s probably part of the hypnotic effect, you betcha!