Sowing by the phase of the moon

To me, its just like writing down what you will do for a full lunar year based on what the moon is doing? It doesn't take into consideration any other climatic changes, soil temperatures or hours of sunshine.
I can't predict what i will be doing the following day, never mind a year ahead!

My planting schedule for 2021 is intended as a guideline/aide-memoire, not a battle plan

I just know that, because I'm busy with a full-time job and other responsibilities, it's easy to lose track of time and forget that I really ought to be sowing X, Y and Z in, say, April if I want to harvest them at their peak in July. So, putting those plants into the appropriate slot on my lunar calendar helps me to feel more prepared. It's no different from any other planting calendar, except that the jobs are divided up by week, not just by month.

I would love to be retired and with decades of experience under my belt so I could just wing it from day to day, but I'm not there yet!