I don’t know where you’re getting this. I think you might be jumping to conclusion based on the category of reason why for the ban in the email. This would fall under the existing policy of banning unattended play and input broadcasting.
But it’s a leap to say that’s all this was. I’ve seen multiple accounts that seem credible of people getting banned without botting anything. There are communities of people who twink and they know the rules. They’re not doing it to sell boosts. There’s no monetary gain so there’s no reason to risk nuking their account by botting. At worst, they might be boosting their own alts. Or maybe a friend.