I don't really think the focus matters. it's the way it's trained. If you train BJJ and muay thai for self defense, you will do self defense scenarios with hard contact and a resisting opponent. That is the only way. Any technique can work when you are drilling it with someone who lets you do it. doing drills in bjj is easy until the the person resists, then it's a different ballgame. The same applies to striking.
i'm nobody...i'm nobody. i'm a tramp, a bum, a hobo... a boxcar and a jug of wine... but i'm a straight razor if you get to close to me.
-Charles Manson
I will punch, kick, choke, throw or joint manipulate any nationality equally without predjudice.
- Shonie Carter