The positive side effect is our minds start to become aligned with what's really happening with the cue ball on each shot. Players that use outside don't usually realize that the cue ball is deflecting in towards the object ball before spinning back on the original line and center ball hitters don't realize that some of their shots are deflecting slightly causing inconsistency.
TOI creates a situation where we feel the cue ball is slightly over cutting the object ball every shot. This way, if we are hitting the center of the pocket we know for sure we're aligned to the inside of the pocket. The amount of feel and touch this creates is a positive attribute and, in my opinion, the key to great shot making.
The greatest shot makers don't have the best eye sight, they have the best "feel for the pocket"...... The TOI taught me how to develop this skill and I"m simply passing it on to those who want to discover it as well. 'The Game is Your Teacher'