Yes and no.

It is absolutely damaging. But the dude knows way more about the tech we use than anybody else on the team. He is autistic as fuck, and his hyperfixation is the Microsoft tech stack.

He spends hours at home watching tutorials because he legit thinks it's fun.

He routinely shows up to work and goes "hey, did you see the new [version of Microsoft package/tool] they finally fixed [thing]!"

And every time I'm just like "no. I did not see that".

He has by far the most experience and knowledge, but he just misuses it like crazy.