Thanks for the details. I am to the point now that the concepts are clear enough that solid literature could fill in some blanks. (It's taken me about a year or so before I could actually begin to visualize wave/particle concepts. Not gonna lie: PBS Space Time and Sabine Hossenfelder videos helped a ton.)

Ok, cool. The issue was that I had previously visualized the EM wave as being more akin to how electrons flow through wires, but with more magic involved. Once I started to revisit many my core conceptual beliefs, there was a ton that didn't make sense. Basically, you just gave me some validation, thanks. (There aren't too many people in my life that are interested in the nuances of photons, believe it or not.)