Community Council members have no power at all, esp not over other players.
Most are not, although quite a few are not Mythic raiders. They enjoy PvP, transmog, achievements, crafting, collecting pets/mounts, RP, etc.
The goal was to have people from all aspects of the game, not just the ones that get the most current attention (Raiding).
The number of low level chars is mostly due to the fact that they are EU players who had to make an alt to be able to post on the US forums. They said exactly that in their Intro posts in the main intro thread there.
In my case, I was made a TS/CS MVP back in 2013 and am also in the WoW Community MVP program. I was asked in 2013 to select a single posting character and stick to it. I did. I have posted on Mirasol for almost 10 years now. My main playing char may change from expansion to expansion, but not my posting char.
Judging people by their posting character is not really helpful. Judge them by what they actually have to say.
You will want to read through the Intro thread to find out more about what each person on the CC is interested in and what their backgrounds are.
I have never been allowed to. I am not allowed to alt hop to hide who I am. If I post on another char (Strawberries still has green) I make it very clear who I am.
Being in the programs means a loss of ability to do a lot of things here - and it means a target on your back. Green or gold is more accessible than Blues and some folks seem to take out their anger on them. It is not fun and is why a lot of people don’t want to even be in those programs.
Being green can be really useful when giving advice on tech or customer support stuff, or even basic game questions. It has uses.