Probably a combination of a few things, field of view, comfort in both neck position and eye strain, perhaps an ease of "looking at where you're aiming" too? Th

Probably a combination of a few things, field of view, comfort in both neck position and eye strain, perhaps an ease of "looking at where you're aiming" too? This is from what I found from a few sites online, I do know that binoculars are recommended at beginner levels in astronomy, however medium-grade and higher levels probably use telescopes more.