The message in the genesis block is to prove there was no premine. Plus, the creator is free to be an exception when etching into the chain why it was created.
Discussion
You don't need an arbitrary message to not prove a premine....
Y'all really grasping at straws here.
I'm making light of it all because I don't think there is any issue here.
You may be right about the premine. IDK. But I know that writing a one sentence message into the Genesis block to explain the purpose of bitcoin is not "arbitrary" nor is it the same as stuffing jpegs into the chain.
Reconcile it all you want. It is absolutely arbitrary... Don't just say it isn't because it does fit your narrative. Be honest.