So you were taught you can't hit someone from the guard?I just saw George St. Pierre, (UFC champion in his weight category) on a T.V show about MMA, training with David Loiseau at Tri star gym where he said the exact opposite. He then said he prefered being in the guard due to the increased submission oportunities.
You don't sound like you misread Don, or do not understand what guard and mount are.
Guard: One person is in a defensive position on their back or side with their legs between them and their opponent.
The person on their guard can submit or deploy limited striking from the bottom.
The person IN the guard of their opponent can strike fairly well, or go for leg submissions. (GSP was talking about striking from within the opponents guard...)
Don was referring to mount, however.
Mount: Having passed the guard (legs) so that you now control your opponents hips by sitting, or kneeling on them. A person who's hips are controlled cannot marshal the power or reach to strike someone above them effectively. In a one on one situation, a sitting mount provides optimal control - you see this in MMA. In a scenario where multiple attackers are possible a knee across the belly mount is employed (you see this a lot on "Cops") - it provides greater mobility and visibility. You do not see it in mma because control is proffered in 1 on 1.
It is also, however, heavily used as a transition move in bjj, or simply because it's fun to squish white belts with...
GSP does not advocate striking from underneath the mount. He advocates squirming.
Reductio ad absurdum:
Your self defense system is laughable. I have discovered that having an armed posse trumps any sort of personal self defense technique. It has been demonstrated countless times in history. At my school we train how to be nice to others, win friends, and influence people such that you might muster a posse at all times. We also study the market, such that one might afford arms for their posse. It's the only best way you can really be safe.
The US army has taken this to heart, forming massive possies(sp?) for war making purposes.
To not train in the methods of posse forming simply because you don't care/think it's impossible/unimportant to make friends who will stand around you all the time is really foolish and short sighted. You're probably already dead!