Thanks for getting back to me and clarifying that point - I had assumed as much, but just wanted to make sure.
I recently watched a video[1] by a fellow called Lex Fridman, an AI researched, and a productivity power-house. A commenter on that video aptly pointed out that Lex comes from a lineage of hyper-productive and scholarly folks, and thus his rigid schedule of 10+ hours of productivity is not necessarily attainable for the rest of us mortals.
I think I have been trapped in a disillusion for a long time that:
A) I should aspire to perform 8+ solid focused hours of work per day, otherwise I am failing.
B) Most people achieve a solid 8+ solid focused hours of work per day.
In reality, due to some recent research and your initial comment in this thread, it has become clear to me that this is simply not the case. The reality is that it's much more of a 'different strokes for different stokes' scenario, and I think I'm gravitating towards the more 'structured unstructured' way of setting up my days, with less of a focus on expected output and more of freedom to enjoy the work and process without the paralyzing pressure of expectations.
I also think I'm nearing the 'final stages of productivity enlightenment', in which one realizes that the constant research and obsession with productivity (productivity porn?) is also a distraction, and that at some point you have to block it out and focus entirely on applying instead of finding the next kernel of truth.
On that note — back to work!
[1] "A day in my life | Lex Fridman" https://www.youtube.com/watch?v=0m3hGZvD-0s