cause the live fire ones can't detect the slight noise of the airsoft firing and the airsoft timers mikes can't handle live ammo blasts. Since they are $150 each, being really fast for CCW draw, (ie, sub 1.0 second to react to the beep, go from hands at sides, gun under a shirt, to a reliable chest hit at 10 ft, takes a lot of work. But once you are reliably that "sudden' at dealing it out, you'll be way ahead of anyone who's never really worked at speed. That sort of obvious superiority at gunhandling causes a lot of people to freeze, and saves you the 50k+$ you would have had to spend staying out of jail and "un-sued" for hittng someone with a bullet. Since the airsoft saves you 20c per shot, and at least $20 for the range trip, it swiftly pays for itself (and for the timers) if you get a face mask and throat protector and have a similarly set up shooting buddy, you can have a ball while learning many things that you'll never learn with live ammo practice.
for the airsoft, you need a lot more than just glasses. those things will raise BIG welts on face and neck, when the gas guns are used at 10 ft or so
Most of the progress can come from dry fire when it comes to draws. You need a little live fire also to confirm your progress. This reduces the cost to become very good when it comes to the draw.
However nothing can replace force on force training. Even if you're a complete noob to any force on force training (whether it be airsoft, paintball, simunition, or even Nerf) and nobody taught you anything other than how to be safe you'll still learn something. Like what NOT to do.
I had done 1000's of hours of dryfire, and was as fast as any when i first shot IPSC, at the creation of same in 1976, after I got a timer, in 1978, I got about 30% faster in just a couple of weeks. you need the instant feedback of the timer. Often, a draw will "feel" fast, when it was actually, slow. you may very well have actually moved faster, but had extraneous movement, so the overall time was slow. Without a timer, that is almost always the case. Until you get a timer, and compare your times with those of the top men, you dont even know what speed IS, unless you have such men available to compete with on a weekly basis. Since there's only a few hundred such people in the entire world, having even one of them locally is not likely.
And by what authority do you conclude that the member Orlando Chuck is not one of these supposed few hundred such individuals in the entire world?
In the US alone there are over 500 grand masters and over 2000 masters in USPSA. https://www.uspsa.org/document_library/2014 USPSA Annual Report.pdf
Do you need to know secret signs and handshakes to be a Grandmaster? Oh wait, I'm thinking of the Freemasons.
