Theres two worlds in combat. Standing up, an the ground. Back in the early UFC days, no one bothered with ground grappling, it was seen as in-effective for self defense, cause most styles purpose was to defend themselves outside against enemies an possibly multiple enemies at one time, like japanese jujitsu was trained by the samuraii in combat, they wouldnt roll around the ground in a battle field when their oponents come chargeing with weapons drawn, especially when another enemy can come charging to join an gang up on you. The world of the ground is a very vunerable place, the moves are restrictive an the actual performance of ground grappling heavily favors a suitable envorinment that is relatively safe from interference from other enemies or even objects such as glass shards an conrete flooring. Walk around my area an i can show you why you should avoid the groudn as best as possible, broken bottles urine an crack needles is something you wont want to be rolling on. So many shunned grappling until ufc. An brazlian jujitsu dominated, they had the clean matted floors facing strikers who had no idea what grappling was... most strikers went down to the ground willingly or stupidly cause they had no idea they were playing ino the bjj game. I will never see UFC as a basis to compare effectiveness in style, i know the difference between sports an actual protection of human life. Protect from the ground game, you need to be well taught in both worlds. But when it comes to the street, there are no rules an no padded floors.. an the ground should be the last thing on your mind. An by the way.. when you see BJJ hold self defense courses... they look like basic judo or JJJ ( small joint manipulations an vital strikes )... even they realised how effect these older arts were when it came down to real fighting.