Few thoughts. People often misunderstand what ‘dry fire’ is. Yes trigger manipulation has its place, and it could be damaging if done in excess on pre-Gen 5 Glocks. But there is so much more to dryfire. The draw, transitions, reloads, and other manipulations can be perfected without ever pulling the trigger. It’s the bread and butter of all top level USPSA and Steel shooters. Ben Stoeger has some excellent books on the subject. If you’re talking practical shooting, this is where the majority of your gains will be made. No need for fancy laser cartridges or digital dart boards. Your eyes, sights, and focused attention are all you need.
As an anecdote from my experience, I joined GSSF and was hooked after the first march. First year I shot around 20,000 live rounds in practice. I barely squeaked my way into bottom feeder level master. Second year I should maybe 2 or 3,000 live rounds. All with a very specific purpose in exercises I was trying to improve on, and to diagnose any problems arising from poor dry practice habits. I easily dumped as much time into dry practice in that second year as I did live practice in the first year. Lo and behold, my scores improved exponentially.
How many good handgun shooters dedicate time to dry practice? Literally all of them.