Many players, when performing their practice strokes, cue aiming at somewhere other than the spot which they intend to strike on their shot stroke.
Some players, as mentioned, have wavering motions or other types of odd hand/arm actions.
As with shooting, the primary focus is on repetition and accuracy of strike.
With that, I don't see that a straight stroke would be necessary as long as you consistently deliver the tip to the ball in a manner consistent with your intentions.
But, having a straight stroke does remove the larger possibility of miss-related errors from falling on a faulty stroke.
You can drive a car with alignment issues, but if you aren't a very good driver to begin with, it will be more difficult to know whether or not the poor driving is due to the driver or the car.
I have no idea if I even have a stroke, so I can only guess.![]()
Another interesting point. I forgot about the guys that point their cue tips elsewhere, like the base of the cue ball and then fire off the final stroke somewhere else.
Lou Figueroa