Like Scott said, I think quite a few people "think" they do something and really do something else, or line up one way and move into a different position on the cue ball. Sort of the reverse of a typical issue I see with some people I've helped who couldn't draw the ball well, they line up low but raise up on the final stroke, then wonder why the ball didn't draw when they were hitting low as instructed. The chalk mark doesn't lie...
Most of the time, I think people are able to run out racks without using much spin. Seems these days most players would rather play safe then take a flyer on a shot, which is the smarter approach to trying to win the game and stay at the table.
As an excessive spinner myself, and someone who has a pretty good stroke, I'm relearning to play the game differently then I used to. I used to just try and get close to the next shot and rely on my stroke to get me to the next ball. After really studying a bunch of matches again, and watching how simple most of the pros are making things on themselves, I decided to simplify things myself and boost my consistency. While I can still pull out the crazy shots as needed, I'm re-learning that I can move the cue ball around the table in a more efficient way than the way I did for years, which not only improves my overall consistency but also keep things at a more consistent level week to week, since all of that spin requires more practice time and for you to be "on" for it all to flow properly.
Paying more attention to my routes and zones, I can achieve better angles and make use of more pure vertical center hits (center, draw, follow), which allows me to pocket the ball more consistently since I'm not worrying about compensating for throw, curve, deflection, etc. Using 1/4 tip of english, just a bit really, to alter the path when it is necessary instead of just automatically throwing 1+ tips on it, again eliminates a lot of variables and boosts the consistency. And then working with my english and new shaft and learning how to adjust for various distances, speeds, and amounts of spin so that when I do need to spin the ball it feels just like hitting center ball.
Scott