I don't disagree with your view point but I've witnessed individuals that viewed it as training while gaming their participation with clothing and equipment they would not have or dress in in EDC.
Everyone brings their own mindset to IDPA (or USPSA or whatever) competition. A very few folks, usually those with limited experience with dynamic shooting of any kind, might mistakenly call it "tactical training." It isn't, and (almost) everyone realizes that.
A few folks use the IDPA matches as a sort of cheap and easy way to practice somewhat (more than static square-range) realistic shooting scenarios with their everyday carry gear. I used to shoot occasionally with a police shooting instructor who did that, and who would take several minutes to clear our shoot house -- even once practicing with handheld mirrors to surveil the next room before engaging targets. Most folks who start out doing this fairly quickly discover that IDPA is a lot of fun and it's more fun if you have a chance at winning, so... they soon move up into the more mainstream group.
"Most" folks who shoot IDPA (and probably USPSA) recognize it as a great way to develop speed and gun-handling skills, to practice engaging moving targets and to practice engaging targets while moving, clearing malfunctions, reloading, and all sorts of other useful shootist expertise in a way that's engaging and "sporty" enough to keep them coming back month after month. They aren't pretending that IDPA teaches you when to draw your gun, how to assess threats, how to de-escalate and avoid violence, how to differentiate cover from concealment, how to make lawful shoot/no-shoot decisions, or any of the other super-critical things that a true self-defense trainer should be teaching you. They just know that after a couple years of IDPA, they can draw quickly from a holster and make a smooth presentation and a couple clean shots on a challenging target in under a couple of seconds. And that's FAR more "practical" than what they did for so many years before, namely show up at a fixed firing range and running a box of 50 through their pistol, at a bullseye target, before putting it back in the box and driving home.
Then there's a small group of folks who will show up with the latest, greatest game winning 5" tactical auto, the perfect slick holster, a custom vest with the hems starched for stiffness, this season's latest colors of Salomon trail tuning shoes which are guaranteed to take five seconds of even a Grand Master's score, Rudy Project glasses, dry hands grip goo, and a poly jersey with their name and sponsors' logos all over it. You'll know if you fall into that group. [Billy Crystal]
It is better to LOOK good than to SHOOT good...[/Billy Crystal]
I think there would be a much bigger disconnect for folks who pay for high quality self-defense training and then treat it like IDPA, by showing up with "match day" kit and treating every teaching scenario as a match course of fire.
I do think that almost all of us probalby would benefit from taking "off" one match a year, or maybe two, and shooting it totally in "street" kit. That can be very enlightening.