It's not who's "right or wrong," it's more about "how we play the game"
Not looking for teaching, I've been working with TOI for a while now and just interested when someone adamantly opposed to it has a change of heart, that's all.
But, never mind.
There's been many points to why we should or shouldn't try to "move" the cue ball off line slightly using deflection "Touch" of Inside (or spinning with TOO). For me it was the conclusion many years ago that pool (and Life) was full of opposing forces. Putting "left" on the cue ball puts "right" on the object ball, low in the cue ball puts high on the object ball, and hitting the left side of the object ball moves the OB right......these aren't "far out" factors and relatively simple to learn and understand.
The one factor that sky rocketed my game is when I "real eyesed" that when I hit the cue ball to the right, it made the object ball go right too....and the more I hit it to the right, the more the object ball would move to the right (and obviously the same thing happened on the left too).
When I'm teaching the TOI system I relate it to driving a car. We can relax and enjoy the experience if the car turns right when we turn the steering wheel right, HOWEVER,
if one day the car moves right when we turn the steering wheel left it will immediately make us uncertain, fearful and we will be gripping that steering wheel in a "death grip".
Trying to hit the center every time is similar because we can't do it consistently, especially on the more challenging shots. It's VERY important to know which way the cue ball is moving and
the way to do this is to favor a side of the cue ball, so if we miss the cue ball target slightly, it either goes straight or slightly more in the direction we're playing it.
To play a game like pool at your highest level your mind, body and the cue ball must be in sync., like in the above example with the car's steering wheel. When steering the car if we turn right and it goes slightly further right, this is not a big deal.....
.it's only when we think we're turning right and we go left that is confusing and we must avoid however possible....to have "peace of mind" and free ourselves to be the best we can be. 'The Game{and the Cue Ball}is the Teacher'