Super training just replaces having to grind on low level Pokemon to up your stats one point at a time. It is not necessary to EV train for normal game play. The difference in having optimal EVs 63 points in a stat. It's a lot when you're min/maxing, but if you're going to do that you may as well be chain breeding for the best possible combo of IVs, Natures, Abilities, and Egg Moves, a grueling process when done legitimately that takes days.... for a single Pokemon.
That's why all tournaments are full of hacks. It's a real problem.
That's why all tournaments are full of hacks. It's a real problem.