The Homebrew folks think this is a non-problem. You may agree or disagree, but the pull request is certainly a non-solution to this maybe-problem. Not just because it gained zero traction and did not get merged anywhere, but also because it's just an obscure band-aid. Either opt-out anonymous telemetry is a good idea, or it's a problem. If to you it's a problem, advocate for its removal in its entirety.

So even if I have an issue with telemetry, good on the Homebrew maintainers for ignoring this MR.