Yes very true....key being that you are practicing good fundamentals that have been learned from good resources. Then shoot all you can and make every shot count for something. Too many times people will say to get a .22 and 10,000 rounds of ammo and you'll be great...this is not the right approach. A .22 is a good cross trainer for some fundamentals but not all just as a .50 is good for some but you will fight others.Train in such a manner that you cover off all of the fundamentals and some rifles/calibers are better at some than others.
Without straying too far from the OP, what fundamentals would you say are better learned using a .50 vs any cartridge with considerably less recoil
.223,308 etc ?