Re: Learning from other arts?
Your level of understanding of the underlying principles can grow much faster than your technical ability. Your knowledge can grow by simply listening to the concepts and ideas of others. Initially you may focus on differences, or even discard some of them, but after a while you realise it is about similarities. Some of the knowledge may need validation and must be put to practise.
In the end your technique shows how much you understand. You can talk about it, but show me a technique and I will know just how much you really understand.