If you're right, then explain how ice skaters can spin dozens of times very rapidly then execute extremely complex maneuvers immediately afterward. The same with a ballet dancer.
In a nutshell, because it is a continuous motion.
p.s., I didn’t say you can’t control your body, just not the eye.
The skater doesn’t have to be focused on an object as if they are chasing it. The just have to memorize and practice the choreography.
Each saccade motion is on the order of 200ms (1/5 of a second). While I believe you can speed read, I simply can’t believe you can control that autonomous motion.
IF you can, you should call Guinness and get yourself in the record books.
Watch the head of a skater spinning. They keep the head pointing in one direction as the body turns. At the end of a turn the head snaps around to catch up to the body