why don't they? we spent half of our time in aikido attacking, why don't we be proficient with attacks? if we are not, then aren't we wasting half of our time?
+1..... Let me see...... I run a school where I don't teach proper/good attacks so that my students can learn good responses to feckless attacks so that I can properly train my students to handle themselves in real-life conflicts...
Practice is 100% of the time. That means attacking properly, responding properly and everything else before, in-between and after.