https://martinfowler.com/articles/harness-engineering.html it's being talked about everywhere.

If you manage developers or product folk, do you allow them to work when you're not looking over their shoulder? All developers can be managers/team leads now. You plan, you delegate, you review.

You're welcome to not do this, surely that's appropriate in quite a few areas of work, but many of us are because we can get more work done than if we we're micromanaging every line of code change. For startups, where a bit of quality can suffer in favor of finding market fit, this is huge.