No, and argument from authority can be a useful heuristic in certain cases, but at least you’d want to take away the one or two arguments you found most compelling and check them out later. In that sense, this is borderline.
Usually, however, this tactic is employed by people who are just looking for an excuse to flee into the warm embrace of an unassailable authority, often after scores of arguments they made were easily refuted. It is a mistake to give a low value to p(my position is mistaken | 10 arguments I have made have been refuted to my satisfaction in short order).
That’s why the rule says challengable inductive inference. If in the context of the discussion this is not obvious then maybe yes, but in almost every other instance it’s fine to make these shortcuts, so long as you’reunderstood.