"Anything less than 100% compliance with attendance and effort is not conducive to reaching your goals. It takes NO TALENT and your GENETICS don't matter in regard to attendance and effort." - Jim Wendler.
"Exercise must be consistent to be effective. This is the first and foremost precept of physical conditioning. If there's a secret, it's consistency. Getting to the gym whether you want to or not, even for a short appearance, a salute or bow is vitally important to the health of your fitness lifestyle." - Dave Draper.
I agree with those guys. If you're talking about the "most important" parts of training, simply putting in your time for the loooooong haul absolutely trumps macros, splits, intensity, or whatever.