How is this comment not an ad hominem? Many-to-most "blockchain experts" are hazy on where, exactly, the line between blockchain and not-blockchain falls (or,

How is this comment not an ad hominem? Many-to-most "blockchain experts" are hazy on where, exactly, the line between blockchain and not-blockchain falls (or, at least, there's enough ambiguity that drawing a sharp line is difficult to impossible). To use that uncertainty to call out someone who professes skepticism about the general concept, while explicitly confessing that same uncertainty, as a means of disqualifying her perspective is therefore literally a fallacy of irrelevance.