Interesting question, which goes straight to the heart of the question "What is Reiki?"
Personally, I have often wondered if the modern Reiki movement isn't too prescriptive. It appears that the concept, like many others, has been hijacked for profit. Yes, I know the history, the why's and whereofs... but it feels disingenuous, somehow, when Reiki is only available through a 'for profit' transaction.
If it's true that we can all access this form of energy and utilise it for healing, why the need to draw it through the crown, learn culturally alien symbols, release it through the hands at all?
Isn't the parent, rushing to pick up the sobbing child, pushing out the same 'stuff', direct, undiluted and straight from the heart chakra?