Sure - the point is that the preprint wasn’t posted by a student without permission of their advisor, it was posted by a professor without (apparently) permissi

Sure - the point is that the preprint wasn’t posted by a student without permission of their advisor, it was posted by a professor without (apparently) permission of their collaborators, who aren’t part of a monolithic lab for what it’s worth. However, I generally agree with your take, and the response seems to me to kind of dodge the responsibility for methodology issues. that responsibility is not really compatible with the “hey we’re submitting to arxiv in a few days, last chance for comments” approach to collaboration that seems to be the minimum expected bar for signing off on the submission form that all authors are aware and agree to publication