There are no advanced locks in hapkido either, just different ways to use basic ones. You might learn a hundred of different techniques, but when you fight in free practice you use only the simplest techniques, maybe five of your favorites. The problem is that if you try to only teach those five and nothing else, it does not work so good, because you need to understand variables of how people move. My BJJ coach had something like twenty different guard passes to memorize for blue belt, and some of them were there just to teach concept. You may see a BJJ player use a basic choke, but how he got into position is more complex. What Klaas is saying is that live practice is part of the teaching methodology. If your dojang did not do free practice and just taught you to memorize more distinct numbered techniques each belt level, then you have not really experienced what we mean. The idea is not to keep learning more and more numbered sets of locks so that you will magically somehow be able to use them if you just know enough. The idea is that you learn different compliant techniques for concept ( and because they look cool) along with dynamic drills and fighting with free movement. You should be doing this inside of a year.