I really dont see what rank has to do with any of this.
I believe most of the people that post on these boards are lower ranks......I don't see many Master or Challenger players post on here.
But.....
Anyone that watches high elo Master and Challenger streamers can see that the stuff they talk about during their streams as far as balance is pretty much the same thing the lower elo players are complaining about on these boards. The only difference is that they are higher elo so their opinion will be heard even if its the same. Im pretty sure I could take the opinion of a Master or Challenger player and post it on these boards. Then get responded by a Diamond player looking up my rank and then telling me "you don't know what you're talking about, you're Silver." Not even knowing that is the thoughts of a Challenger player.