So? ;-) Knowing those details is productive, but just because some utterance doesn't aid that research doesn't mean such an utterance is worthless.
Second, the response that "this conveys ... what everyone knows ... that these institutions are ... no longer in accord with our present conditions" seems altogether too clever. Most "inveighing" (which is just a sort of "weasel word"(*) for a moral argument to which no counter-argument is available) happens at a time when these institutions are an accepted part of society and such "inveighing" is arguably one of the agents of change that abolish (or as the quote puts it: makes them "no longer in accord with our sentiments") these practices.
(*) This reasoning seems to elevate discomfort to a philosophical position.
--ravi
-- Anyone who takes an effort to intellectually challenge the status quo and established habits is infinitely more venerable than hacks defending that status quo and established habits, regardless of the truth function of their propositions. -- W.Sokolowski