Creativity is like a variable weather system. There is "flow" but patterns can persist into a kind of doldrums. That's why I like to make my own slight perturbations or interruptions of the process, and sometimes decamp to another medium altogether.
There really is no flow when certain parts of a project are tedious and boring (like music mixing), but once something is resolved or completed, there is a kind of flow in retrospect, which is very useful for the sake of perseverance in one's craft.
For example, I hate tweaking individual tracks, but I like the effect it has on the song itself, and in the other songs in an album or playlist. Ultimately there's a flow in a larger system.
I love working in the digital realm, but computers can become too seductive, drawing everything into themselves, such that the spiritual aspects ("soul") can't escape their allure. (Computers can create fake Flow, masquerading as endless editing).
"Flow" is a term of art word that flows and ebbs based on the flows in your inner experience and what the mood is. When Flow is high, the ideas (seem) good, and you're on a High. When the ideas need shaping usually the Flow is low, but can give one the feeling that you always operate in flow in the end, you just don't see it as such in edit mode.