I'm not that good that I know when a miscue is coming. If I knew, then i'd never miscue & this entire conversation would be moot. Miscues happen. It's often a mis-stroke but often times it's equipment failure as well. Tips wear down, compress, glaze over, etc. All chalk isn't created equal, either, nor is it impervious to humidity. Table surfaces get doused with hand oils, dust, & grime during play, as do all of the balls when racking. The cue ball gets handled more than any other ball, and how often do people wipe it down? All it takes for a miscue is an off center hit with wet chalk, dirty ball, etc. It doesn't have to be a bad stroke at all. It only has to be the right conditions to cause the tip to slide off the ball. The odds aren't great, but every time the cue ball is struck the odds increase, and eventually lightning strikes. It's not rocket science but it shouldn't be ignored, either.
Another thing that increases the chance of miscue is the game being played and the style a player has. 9-ball on a big table requires the player to move the cue ball. Some guys use a lot of spin while others play angles. Either style can be equally effective, but the guy using a lot of spin will likely miscue more often. Doesn't mean he has a bad stroke. It only means he is increasing his odds of miscuing by hitting off center more often. In either case, the 9b player will miscue more often than a couple old guys playing one hole, bumping the balls down table at pocket speed. Those old guys may hardly ever miscue, but it doesn't mean their stroke is better or more pure than a world class rotation player. It only means they are risking miscue less because they hit soft & center. Rotation player hit firm, off center shots regularly, so their chances of miscuing are significantly increased.