Respectfully, partially, disagree.
While its "possible" its not the most likely outcome. Your looking at the exception not the rule........and everybody
thinks THEY are the exception.
And your certainly not the "average" guy that is looking at what is essentially self training.
For one thing your actually in the military and have access to experts even if its just now and then.
Yes it "does" happen......but not often.
I would not trust an accountant that had little formal training but had, according to them "watched a lot of DVD's", would not go to a Doctor that had no formal medical school but trained "with" Doctors on the weekends.
Better than nothing?.......sure.
But even in your profession NOBODY joins the military and gets Basic Training waved
because "they watched a lot of DVD's and worked out with people that were in the Military."
Try telling that to a DI and see how far you get.
Now having such a background can make you much better PREPARED for Basic but it does not replace it.