I think the author of the article is describing a false dichotomy. The purpose of deliberate practice is to build the underlying knowledge that leads to the creativity and also unlock the intuitive sense that comes from mastery.
There's great creative power in not knowing what you don't know and trying out random things because you have yet to acquire the knowledge of how things are 'supposed' to be done. Knowledge is valuable but at the same time I am so over the mastery movement, which is as much about excluding people from the club by making them think they're never ready enough as it is about giving them to tools to succeed. I started pa…
That's something people who don't want to learn how things are done like to say, but isn't really true and is most often simply an excuse to avoid having to learn anything; it's commonly heard from amateur musicians for example in an attempt to avoid learning anything labelled "theory". The reality is that what you're likely to do without looking at what other people have done isn't going to be very creative and is likely way way inside the box and simplistic.
You're not really breaking the rules if you don't know the rules you're breaking; flailing around wildly in the dark isn't creative, it's just dumb luck if you happen to do something new. People who are truly creative, know exactly where the box is and ends and why they're breaking outside of it.