I think a running checklist of variables and visualizing your shot is an axiom of sports.
I suppose I could just head out to a course four days a week and just chuck every disc in the general direction of the basket, but I am there to challenge myself. I don't randomly pick a disc, I formulate a plan and choose a disc based on my plan. The list provided was most certainly an abridged version for disc landings. There are dozens more variable to consider with every shot, outside of the landing. This concept is crucial in the approach game. Have you ever considered the wind before throwing? Trees?
Sun/shade could easily have an effect on ground softness or moisture, impacting how a disc first reacts with ground strike.
Maybe we should have more YouTubes on course and game management to go along with the millions on how to throw 500'.
Yes, sun/shade is often a grandmaster consideration, but explaining that could take years.