As a paid up shodothug, I love and see the benefits of shiai randori. But I'm a bit lost as to the point of embu competition - I can't really see what I learn from it that I wouldn't learn from demonstrating kata in a noncompetitive way. If anything, I seem to get less out of it since when I'm tori, my uke will be deliberately trying not to show up what I'm doing wrong, making it harder for me to learn anything.
Obviously, though, people who are much wiser and more experienced than me believe that it is worth doing. So what am I missing?