Your very argument states that there are bacteria and thus his question is relevant, hence you are contradicting yourself. A red herring is an unrelated diversion.

His post was neither non-nonsensical nor unrelated.

Also, not all bacteria are good just because some bacteria are good. Your post was actually much more of a logical fallacy than his was haha. Having a bag full of beans in a tropical climate for a few days could very well breed some nasties.