Bad writers wait until they have an idea to start writing. Good writers know the ideas don't happen until after they've started writing.
What I meant to express is that chopping up your week into a pre-defined routine that you do every week for years under the guise of discipline is the wrong way to approach it.
I think we're mis-communicating because neither of us defined what "process" means to us. Perhaps we really agree with each other.
Recognizing that, then the problem is just one of how and when you put in that time to go in deep on ideas, when nobody is asking you to. For a lot of folks including myself, routine helps: "I will spend two hours each day on the hard thing I don't know how to solve and have no actionables on," and usually within those two hours something happens to develop your thought process.
For younger folks, deliberate engagement in "designed creativity" is something that isn't just not taught, but actively discouraged by the lack of external feedback, role models or conversations. So it's much harder than just picking up a skill by copying and subsequently making some surface changes to the copy.