Why is Multi-boxing Allowed?

[Krushkill-blackwater-raiders]

@Partyrock-shadowstrike

I mean has Blizzard come out and said key cloning is bannable?

Its calling mirroring.

Policy Update for Input Broadcasting - May 2021

On November 3, 2020, we posted an update to our policy for input broadcasting software, and soon thereafter, we began taking action against accounts found to be using third party software to automatically mirror keystrokes to multiple game clients. We find that, like full automation of play, multiple-account mirroring disturbs the gameplay experience for the vast majority of players who control a single account at a time. We will now additionally prohibit the use of all software and hardware me…

We will now additionally prohibit the use of all software and hardware mechanisms to mirror commands to multiple World of Warcraft accounts at the same time`

Perhaps take the time to read the support articles