I actually agree to some degree. True, you can probably learn some techniques, but many times, the pro players have very specialized situations that call for specific builds that don't pop up in lower elos, and sometimes there are more effective builds for lower elos that enable snowballing, which doesn't really happen in pros that much. Generally low elo games can be carried just by getting ahead and then building hyperaggressive, whereas you open yourself up to possible lategame destruction. At a certain point, certain champions will hurt no matter how far they are behind. Take yasuo. Even though he requires an insane amount of skill to play throughout the entire game, sooner or later, he can two shot people. So unless you keep snowballing, if you aren't building defensively, you're going to die lategame. I prefer to just snowball my way through bronze, tone it down a bit more in silver, but still go slightly aggro. From what I hear from people who have made the climb from bronze to diamond, it seems that the aggressiveness is highest in bronze and diamond plays more tactically. Therefore meta itself changes with elo and consequently, a bronze player building a pro build and playing bronze style isn't gonna do well. You have to have the skillset to match your specific build.