That doesn't change what I said at all. To add new material, one must remove current material. Even if it's removing similar material, that doesn't change that it's a zero sum game (in terms of quantity, if not quality).
Not exactly. MMA incorporates already used exercises or can be made to. Technique would just need to be improved. Quality MMA could replace the quantity of poor exercises. Games like dodgeball could be replaced with MMA.
Not true. Someone can be strong in mainly one technique and take out someone with stronger technique in other areas. Even if you are trained in MMA, If you know someone else has also been trained to knock or choke someone out, you're less likely to pick a fight with them.