Board Thread:Questions and Answers/@comment-2600:8802:1200:3460:B7:BA35:49D2:B090-20170727203838/@comment-6697950-20170729081338

Combat skills in SAO primarily revolve around the use of Sword Skills (i.e. higher level unlocks more Sword Skills), so whether you have a Martial Arts skill or not should not be of much importance for what you're interested in.

Disarming an opponent should be possible either way (don't remember anyone doing it against monsters though), but no one in the right mind is going to do judo in SAO when it deals insignificant damage without Sword Skills and the player's life in-game is tied to their life in the real world.