After 3 times you're still not answering the question correctly. Why are you making this appeal, why is your friend not making the appeal themselves?
I must have imagined that guy stealing a rocket, because he already has 4 bans and I have slayed him twice just now. What idiot would still steal after all that?
This guy offering me 100 euros for an unusual worth 50 euros must be totally legit, because he has 5+ years of service. What idiot would scam with an account like that?
Point being, how old/main the account is doesn't really mean a thing. Moreover, it is not the admins' job to think about what motivation someone could have to do what they do. It is their job to assess whether a rule was broken and act upon that.
Nothing in my post is meant to subvert the decision to unban the person. I have no opinion there; do as you like. I just wanted to respond specifically to these rhetorical flaws.
Knowing how people are, I bet someone is STILL going to interpret this post as me wanting to keep this person banned, even after I said I don't care about that. Let's see what happens.