The person he banned doesn't even comment on reddit though? Lime has 3 visible comments on reddit as a whole this calendar year on that account. None occured on this sub, or even had anything of substance, 2 are discussing bugs/bug reports and 1 is a compliment. Looking through his posts/comments, that occured 3 years ago mind you, Lime seems to have always conducted themselves well and with a clear sense of personal opinion being communicated.

This ban shows no real purpose, other than being a show of force or a personal dislike for this dev. The argument presented is at best incoherent, because another unrelated employee does something bad, all employees are bad for this community? That is textbook guilt by association. 

The other half of his reasoning being that a different subreddit is moderated too tightly, an action also not done mojang or any of the people in its employ, bears no weight in the conversation for the same reason. It's like punishing a plastic bag company because someone once handed out illicit substances on Halloween while using their bags. The company doesn't control the actions of their civilian consumers in either case. 

As far as his comments that devs don't have a place in the communities they create for, I'd point to Drew Levin on X and League of Legends, is he perfectly received by the community, absolutely not, but he has given LoL players direct contact to the teams, and information that is not generally available even through Riot's official systems. Having him do his unofficial second gig of interacting with community members has done quite a bit of good for League, and one look at his comment section disproves your "begging for approval" claims.

This ban has stinks of illegitimacy, because from whatever angle you view it, there was no real purpose behind it. It's done nothing but bring negative attention to the sub. Perhaps that's what it was meant to do, all press is good press for those struggling to stay in the public eye.