To not look at your objective target last is just plain silly as hell in any endeavor that takes eyes to perform.
But! It's fair to say that that in addition to delivering the cue ball to the object ball, you're also delivering the tip to the cue ball.
The difference between pool and all those other sports is this:
Tennis, baseball, punching a guy in the mouth: you may need to swing high, or low, or forward, or backward. No two swings are supposed to be identical.
But in pool it's pretty much the exact same swing every single time. You're just pointing the stick in a different direction. Yes there are other shots that use a nonstandard stroke but most of your strokes are identical, or at least that's what we're all trying for.
I think looking at the OB last allows a person to make subconscious corrections to their aim and english and speed that might help a shot that is on the verge of being missed. But in theory this is a bad habit, we wanna keep away from steering and get the stroke as straight and consistent as possible. If looking at the OB last encourages even a tiny bit of steering, maybe it's not all it's cracked up to be.
I played the entire night looking at CB last and only missed 2 balls that I felt I could have made looking at the OB last. And to be fair they were like 75 degree cuts anyway. I made all my other shots just fine looking at the CB last. I also found a strange sort of confidence hitting long straight in shots. I know that I only miss these when I catch the sides of the CB as I stroke. I was never in danger of doing that looking at the CB last.
I think it's sort of amazing, over 10 years of looking at OB last and with zero practice I had no problem switching to CB last and running out. I encourage others to try it before they knock it. You shouldn't play any worse and you might find your CB position improves.