Because every other pro region - LAN, Turkey, EU, LPL, LCK, etc. has access to this and just NA does not?
This is just another excuse.
Sure, it can be harder to consistently get your main role at master, challenger elo here in NA due to smaller player base. But other than that the excuses are largely exactly that... excuses.
Food for thought:
We have high ping here - we can't prepare as well as in Korea. - Wrong. Did you ever watch Dragon ball? Goku trained in the gravity chamber and look at the results. Other regions have less reliable internet than NA or higher ping that some players put up with and they compete just fine. Season 2 world champions played on the Korean servers and played with NA pro's and challenger players on 100 ping in NA due to the distance they were connecting from. All it did for them? When they got in low ping environment their reaction times were godlike. Because if they can flash a malphite ult at 100 ping, it looks like it's slo-mo at 0 ping.
I can't always get my main role. True you can't. But understanding other roles' jobs, the strengths and weaknesses and limits of their champs can help you better in teamfights with these champs on your team OR against you. You autofilled and ended up playing zyra support but usually play mid? Now you better know if you can dive in on zyra and kill her without dying when your health bar is low as say... syndra or talon and get out alive.
Champions can often be flexed to other roles. Sure they might be played slightly differently, but you can still practice the mechanics vs your opponents and get a decent feel for the champ. Moreover, again you will gain better understanding of other champs and roles and be able to more quickly factor in everything they might be capable of doing in a fight and adjust your plans accordingly.
Oh... and Faker regularly plays pretty much everything. So if you can be that good and play every role and all sorts of champs in each role... then being forced off-role sometimes really can't be that bad.
