In my opinion, the proper answer is who cares. Stop overthinking it. STOP. Is having the perfect arc of your hand and how you position your elbow going to make you shoot the 3 like Steph Curry? Do you think you can just copy his mechanics and you will shoot like him? No. Shooting 4 million 3 point shots is a start. Then, playing the game a LOT, and NOT thinking about anything except winning.
Just like any athletic endeavor, there are two useful activities. Anything else is unproductive.
#1: Practicing SPECIFIC skills. VERY SPECIFIC. Braking at the limit without lockup (smooth track). Braking at the limit by going over , and re-establishing control (rough tracks…I dont care how good you are…it is gonna happen on rough tracks and you better have the skill).
Load management (how to load the tires so that your corner initiation has no lag). Transition from braking to cornering (straight line braking, vs carrying/overlapping). Using your eyes (many good drivers do NOT look at their braking points…and hit them within a meter every lap) And with this sort of skill building, the stopwatch is your enemy. The eyes of an experienced coach and smart Data are what you need.
#1B: In support of #1…there is also physical and mental fitness. This is just giving yourself better tools to implement the skills you are practicing.
#2: Forgetting about all that practice and simply competing to win. Wheel to wheel racing is how you get truly fast. Your mind will miraculously take the base level skills you have internalized, and figure out how to apply them when you are faced with actual competition. You don’t need to think about the lines. It will be pretty obvious. You do not need to worry about rotation vs sweeping through a corner. Going to school on a faster driver will tell you what is the best way for a given situation. GO RACE.
So quit thinking about all this BS. Go race. When you identify an area you are weak in, go practice THAT area. Initially when you start karting, it will be braking, and basic feel for what the limit of the kart is. As you become more advanced, the transition from braking to turning is where you will find a lot of the magic. When you initiate a corner perfectly, everything else is easy.
I groan when I hear newer drivers talking about lines, cornering “philosophy” and where they should apex etc etc. It is the least important think you can worry about. Put in the work, build the skills, and then go race to win. Ever race is ladder, and every driver you go to school on is a wrung in that latter.