I think its because we don't take the time to figure out what's wrong.
It's easy to say we take the "simple" shots for granted. But dig a little deeper and you can learn that the simple shots are, in many cases, not so simple. All the little variations the game demands we master to properly execute one simple shot is easily overlooked. Simple shot with: draw, stop, follow, english, jacked up off a rail, and with a wide variety of distances the cue ball must be sent for the next shot, to name a few. IOW, it's a simple shot, but not really.
But, it's not just the shot itself. It is our mechanics and all the little variations that inevitably sneak in under our radar and change how we setup for each shot. Even the exact same shot can represent a challenge: Are you gripping the cue in the same spot? Standing in the same place? Accomplishing the same footwork? Using the same bridge? Head/eyes in the same locale? Using the same sequence to get into shooting position? Same eye movement? Warm up strokes? Grip adjustment the same? And so all that is a challenge too.
And so what happens? We face the simple shot and get into shooting position (one way or the other) and our wetware instinctively knows something is amiss. And, especially if it's a competitive situation, it's most unlikely that we're going to want to show any lack of confidence and well, getting up and down on a shot is a bit embarrassing. (I guess less so than missing the shot itself.) So we press on, shift our weight a bit, alter the height of our bridge, change the speed of our stroke, and pull the trigger, usually with not so good results.
So what is the answer? I guess more time at the practice table. But that doesn't mean just shooting balls. It means being aware of your body mechanics; trying to be consistent about them, and taking the time and effort to analyze why we miss the simple shot: setting it up again and again until it is consistently made and realizing that the simple shot with follow is not the same simple shot as the simple shot with low left. Because, after all, that would be a different "simple" shot
Why do you miss the easy ones?
Lou Figueroa
It's easy to say we take the "simple" shots for granted. But dig a little deeper and you can learn that the simple shots are, in many cases, not so simple. All the little variations the game demands we master to properly execute one simple shot is easily overlooked. Simple shot with: draw, stop, follow, english, jacked up off a rail, and with a wide variety of distances the cue ball must be sent for the next shot, to name a few. IOW, it's a simple shot, but not really.
But, it's not just the shot itself. It is our mechanics and all the little variations that inevitably sneak in under our radar and change how we setup for each shot. Even the exact same shot can represent a challenge: Are you gripping the cue in the same spot? Standing in the same place? Accomplishing the same footwork? Using the same bridge? Head/eyes in the same locale? Using the same sequence to get into shooting position? Same eye movement? Warm up strokes? Grip adjustment the same? And so all that is a challenge too.
And so what happens? We face the simple shot and get into shooting position (one way or the other) and our wetware instinctively knows something is amiss. And, especially if it's a competitive situation, it's most unlikely that we're going to want to show any lack of confidence and well, getting up and down on a shot is a bit embarrassing. (I guess less so than missing the shot itself.) So we press on, shift our weight a bit, alter the height of our bridge, change the speed of our stroke, and pull the trigger, usually with not so good results.
So what is the answer? I guess more time at the practice table. But that doesn't mean just shooting balls. It means being aware of your body mechanics; trying to be consistent about them, and taking the time and effort to analyze why we miss the simple shot: setting it up again and again until it is consistently made and realizing that the simple shot with follow is not the same simple shot as the simple shot with low left. Because, after all, that would be a different "simple" shot

Why do you miss the easy ones?
Lou Figueroa