I agree to the point that a training system or routine must fit you mentally.
For example, maybe one person with a 4 day routine you will workout for two months then quit because "it takes a lot of time and get me stressed" while that same person would go on for years with a 3 day routine (making much more progress) just because it suits his training tolerance. And that is considering only the days-per-week variable, wich is one of thousands!!.
I also agree that there are some Macro training tools that fit all systems and that opposing training philoshophies agree with. I find basic compound movements is another tool many agree to be useful.
And yes, we do think to much. Sometimes we need to get back to our "first love" when we first meet the weights and lifted then with passion, without thinking so much in the tempo or if we will or not deload next week .