It was derived from breath, but that doesn't mean it meant breath. Spirit nearly always, both in the ancient and modern world, referred to incorporeal or metaphysical things.Not that the OP wasn't overselling his/her point, either...You might want to read up about how scientists and philosophers a couple hundred years ago (there wasn't really a difference until then) talked about the life force, the spirit, the animating principle, etc. Historically, the term meant breath, and historically, it applied to all the facets of life--respiration, ingestion, motility, digestion, etc.
I think the more important issue is not whether "spirit" can refer physical things or not. It is whether the context suggested that such was intended. If the context was about spirit in a non-physical way, then it doesn't matter that a definition can be interpreted to mean something physical.
Deliberately choosing to interpret a definition in a way clearly not intended by the speaker doesn't add any value to a debate.
Sure, it's possible to overthink things...but then, some people don't think enough about things and start commenting on subjects other people just might know more about.
Making a simplistic, generalized complaint about other peoples' "sophistry" is just plain stupid in my mind. It's not a good way to engage in a good discussion with people. Instead of talking directly to the individuals who uttered those statements, to start a new thread to complain in general, where lots of people can call you out for doing the exact thing you're complaining about...well, you should expect the kind of responses you get.
I agree that making a thread calling someone out on this is in poor taste. However, I do think that the OP makes a valid observation that clever interpretations are often counter-productive if your purpose is to clarify meaning.