[Bartweiss]

What stands out to me is that the author has correctly identified a problem, but provides an unsupported solution that has failed for a lot of people.

I'm going to push Duhigg's Power of Habit here as a somewhat more rigorous treatment of these ideas. Duhigg, I think, would agree that "write every day" is an awful plan. His solution, though, would not be "write when you feel like it". Rather, it would be to establish a clear, reliable trigger for when to sit down and write.

"Every day" is the sort of standard that leaves you staring at a blank page at midnight, debating whether to just go to bed. "In the quiet stretch after dinner and dishes", by contrast, gives you a clear cue to do your task. It also averts the problem of falling of the bandwagon - if you go out to dinner, or work late and skip the meal, you never got your cue and don't have to record a 'failure' of your system.

It's certainly the case that never-fail systems are fragile and unproductive; until the habit is ingrained they tend to collapse altogether at the first interruption. But the solution isn't to abandon scheduling, it's to learn what good, proactive scheduling looks like.