Right and “we don’t need to use black because we haven’t yet and things work fine” is a bad response that dismisses the real needs and concerns of others on the team when they’re saying “things aren’t fine we want computers to handle the nitpicks from here”. I wouldn’t say it indicates junior tech skills but it’s a sign of junior management skills.

>I have to disagree with the view that not using black means the lead is not senior.

I disagree with this straw man too.

It's the code review focus on small almost irrelevant stylistic details that signals a lack of experience.