The problem with people's views on the meta
People started taking Champs like Vayne top and doing well with it. What Vayne top? Your out of your mind. That is what they would have said in season 3.
Even the problem Champs people are going on and on about have clear counters. The counters may not commonly be found in the role you need them in but nothing is stopping you from putting them there.
I played a few games as Yorik Mid. Took me forever to find groups that would go along with it but in that time I faced a Fizz and a Zed. Both played as expected but I won lane hard in both matches.
I watch pro streams quite frequently and there are countless times I have seen them make off picks. Only when people see them in the finals do they become OMG why are you not pick/ban.