I actually wanted to introduce myself... But this is an interesting post.. The science is actually behind making the scope and weapon itself. Shooting is a pretty straightforward skillset. The right training and practice makes perfect. The issue is you will see a great amount of videos, is because they want to sell you their products, let it be their "Premium reloading Die set" to their "Long Ranger Course I, II, III , IV, V, VI, VII, VIII" You don't even need a Collimator to zero the scope to a given distance, yet they will tell you need to buy their "Brand X Collimator for ULTIMATE Scope zeroing", even if their collimator is a POS, like those shaped like a bullet...
Down the road, the important is getting the right training which is something that doesn't take a lot of time and practice. A lot of people can´t hit at 500 meters because A)They got a lousy training B)They don't practice enough C)A and B.