There are better alternatives, even, that are a quick and painless install process away. For example, nixpkgs is competitive with it, and does not include the Google phone-home supercookie tracking spyware that is on by default without consent in every Homebrew installation, and works great on macOS.

Homebrew could disappear tomorrow and nothing extremely bad would happen. That can't be said for the power grid or water system. Tossing around the term "critical infrastructure" for things that are important but very sub-critical is hyperbole that waters down the (important) term to meaninglessness.