Oi zuki/junzuki (oi zuki on this text from now on) is arguably very important technique in karate as it is kihon technique extracted from katas. But last weeks I have had problems when thinking about applications using kata sequences involving oi zuki. If I think oi zuki as an training method of how to use body or as some lock/throw application, then oi zuki is okay technique. But as an punch, I think that the step is problem as we don't have enough space to execute full step oi zuki. So why does katas have those oi zukis? I don't like the idea of training body mechanics, as I think that katas were made to have realistic applications. So are all oi zukis then some locks/throws/something like that or can they be used as realistic punches? Does anyone else see the problem with that step? Any ideas or is this just some beginners stupid rant?