What do you mean? It’s perhaps the most apt analogy I can think of. In the strictest literal sense, physiological care is a flesh mechanic servicing your flesh parts. The main difference here is a matter of scope, but that is the point of analogies; to reframe a thought in a smaller and comprehensible way.
Only way we could stay 1:1 is if the discussion is solely populated with qualified medical professionals and not a mix of differently educated laypeople.