As for eye darting, we all do it. Otherwise our heads would be in a state of constant jerking and twitching as we make small angular changes in our central gaze. I recall a few years ago Elkcub provided a link to a paper which found that the eyeballs can comfortably swivel over a range of about 35º before head movement is required. That's more than half the AFOV of the binoculars under discussion. Swiveling the eyeballs over 20 or 25º when reading or looking through a binocular probably goes quite unnoticed, which must explain why people can imagine that their eyes never dart around the field at all.
Henry
A large proportion of the discussions we have on the Forum about 'eye-darting' is usually in the context of the sharpness (or otherwise) of the edge of the field of view of a particular model of binos. Often there is mention of exploring the field of view from edge to edge and it is this 'extreme eye-darting' that I personally find uncomfortable.
You are absolutely right that a good deal of eye-wandering takes place within a pretty wide segment of the field of view but for me this is an entirely different thing from darting from field edge to field edge.
Other folks are apparently quite comfortable doing this.
Lee