I understand the logic of what you’re saying.
I tried a similar approach for a while, but I feel I tend to do better when I have a plan.
Maybe the mental preparation gets me better focused - I don’t know.
But, I seem to get better workouts when I start thinking about the specifics well in advance.
Sometimes, I may slightly deviate from that plan.
For instance, if I feel remarkably well and still “fired up” after my last set of bent-over rows, I may choose to do another one or two sets before moving on.
Or, if my SI has been bothering me all day, I may skip or swap out movements that I know agitate it.
Things like that.
As far as the pros…
I never try drawing comparisons between myself & Draper, Lee, or anyone else who has superior genetics and superior response/access to “supplements.”