I can't fathom why this would be depressing.

Senior developers aren't paid to write code. They're paid to cause good outcomes. Sometimes writing code is helpful for that.

If the team needs more documentation, more demos, or more mentoring, and you don't want to do it, you don't sound like you're behaving like a senior dev to me.

> If the team needs more documentation, more demos, or more mentoring, and you don't want to do it, you don't sound like you're behaving like a senior dev to me.

That's a big "if". Sometimes those things are just not needed by the team. But management is imposing it on you because they want to make you jumpy through hoops.

You could invent a new kind of desalination plant, bringing in millions for the company but the manager still wants you to first spend a year through bullshit hoops.