That "overhead" is essential to keeping a team running.

Hiring means the right people get brought in and the talent pool grows and a positive culture (say, blameless post-mortems, learning and sharing, etc.) forms.

Firing means that people aren't getting booted on a whim and that when they are getting booted it's done quickly and efficiently.

Performance reviews help guarantee good pay or good feedback for the people on the team, and are what helps keep them from leaving.

Meetings are the way that you advocate for your team and where you can meatshield to keep the howling vortex of crazy that is business for making their life harder.

It's all "overhead", but that "overhead" is very important to the quality of life.