Unfortunately there are a number of Officers working on the streets who look at their sidearm as nothing more a counterbalance weight for the gear on the opposite side of their duty belt and they don't give a rats behind how good they are with it as long as they pass the minimum qualification course.
Those are usually the types who aspire to be a career "desk driver" and look at their time on the streets as an unfortunate part of their career.
Some Departments have taken measures to force those unmotivated types to improve their skills set.
The use of "surprise" moving targets and the use of targets with a smaller score area are making those with a lackadaisical attitude towards qualification pay more attention to improvement.
The rules are if you don't qualify on the tougher combat course, you can't carry a sidearm, and by default if you can't carry a sidearm you can't be an Officer.
The other factor in OIS situations is that many Officers haven't learned how to channel their adrenaline rush's into a useful tool instead of a debilitating shock to their system which often causes them to spray shots wildly in the hope of hitting their target eventually..
One often sees more experienced Officers follow the advice of Wyatt Earp which most often results in minimal danger to anyone but the bad guy.
Fast is fine, but accuracy is everything. In a gun fight... You need to take your time in a hurry.”
-- Wyatt Earp