Maybe the joke isn’t particularly fair, maybe it doesn’t really need to be.

You have logical reasons to avoid antibiotics and preservatives. Someone might not agree, but whatever the case, you made that decision based on some amount of evidence.

Raw milk though… I think the meme is correct to equate anger with pasteurization as a denial of germ theory. We pasteurize and refrigerate for the same reason: to keep bacteria from growing. It is a fair question: if pasteurization is unnecessary, why is refrigeration necessary? Avoiding preservatives doesn’t beg the same question.