A topic that refuses to die is “competition will get you kilt in the streets!” Developing and testing skills via competition is an excellent way to pressure test your abilities. It is neither training in nor application of tactics, not even if your sport thinks it is. Tactical training, whether it is CQB, vehicle stops, tubular target assaults, etc. is primarily focused on problem solving skills. It is not designed to focus on your raw mechanical skills, which are most efficiently built via a separate training block (CQB runs in the house vs flat range movement and shooting drills). I shot USPSA long before I ever started my old job, and continued to compete during my career as time allowed. At no point did a behavior only suitable in a match ever bleed into my work, but instead the experience gave me an edge at work in having a very high level of mechanical skill. Further, I guarantee that no armed professional has ever stood on the line at range day and thought "I hope I don't build too much mechanical skill."