You made a claim that they were obviously irrelevant.

The respondant expressed uncerainty as to their irrelevance "They may be irrelevant." as opposed to the certainty in "The analogies are obvious." and "They are not obviously irrelevant."

That is a distinction between something being claimed as obvious and the same thing being seen as doubtful.

If you do not wish to explain a point there are many better options* than inaccurately calling it obvious. For example, linking to a previous explanation.

*in rationality terms. In argumentation terms, these techniques are often inferior to the technique of the emperor's tailors