Its not about being righteous. The difference is, arena is PvP. We already have guilds. We already have ways to work as a team to reach an objective. The whole concept of the arena is one against one. Let alone the fact in my shard there are 10 of the top 20 from the same guild, besides the discord group.
There are fundamental flaws when it comes to arena and PvP. It's currently PvTeam, and the rewards tied to it are needed to advance in the game. If you can have collusion, move it to guilds vs guilds in PvP. Another flaw is being able to lock a player from battling and advancing themselves because a group decided they don't want them to be in the top of the arena.
And to say that they have a discord group because they don't have time to refresh is the same as not wanting to join the discord and spend the time having to shuffle around to fit with the group. It's a wash, same amount of time, except we know when rewards are paid, and when to be online to get those rewards. It's a half hour or so before to get to the top.
PvP should be PvP, or tie the rewards to not have specific toons that require those rewards. Make the rewards be crystals and credits, and gear that isn't limited to just arena. Remove the arena tokens to spend on toons. Then if you want to collude in arena, it's not toon specific, you are just battling for resources to spend elsewhere.