Some are issues that the shooter just needs more learning, practice and the strength that comes with training. After all, outside of our pro shooter educator, Mr. Seeklander, how many of us exercise our grips and fingers?
The other issue is that many people that sell guns have no true understanding of them. They only know the sales pitch they get from their managers and the gun reps. Or even worse, what the gun magazines say - Mr. Zumbo and his anti-AR rant that many heard and believed, but that many did not pay attention to his retraction.
I may sound like a broken record, but practice, take classes, practice, learn, learn, learn ...
Good luck!