The fact is that so much training is expensive, far away and time consuming that it loses priority to many folks. Many ranges discourage drawing from a holster and rapid fire.
I agree with everything you said up until this sentence.
Dry firing is cheap, blue guns that are exactly like your gun are cheap.
A couple of classes with an instructor who will give you dry fire drills to practice on your own are not cost prohibitive. Dry firing can be just as beneficial as live fire, more so if there are structured dry fire drills with a specific purpose.