Of course, I'm just noting that it's very enigmatic of Twin Peaks from the start in how trusting they are of Cooper because he's an FBI agent. They're charming and trusting in the sense of still holding that tried and true. When Cooper starts doling out his own crazy ideas from the start, they treat it as gospel because they think it's something above what they know as a small town.
Another good example is the "I had a dream" scene, where they completely believe that Cooper's dream had the answer and are enraptured by it. Of course we find out later the more metaphysical reasons, but at that point they trust it as a process. Something that comes from the big city, as it were.
All of which is counterpointed by the cynical and dreary Deer Meadows of the prequel movie.