> This makes perfect sense, given that the thumb is the least dexterous finger I disagree on this. For an item you are looking at, the thumb's range of motion

> This makes perfect sense, given that the thumb is the least dexterous finger I disagree on this. For an item you are looking at, the thumb's range of motion covers the most area, and the joint angles of the thumb means it has more degrees of freedom of movement across that area. An index finger can be more precise but a thumb can reach more positions.