A consequentialist would ask, with an open mind, whether burning the libraries lead to good or bad consequences. A virtue ethicist would express disgust at the profanity of burning books. Your comment closely resembles the latter, whereas most discussion here on other topics tries to approximate the former.

I think it is no coincidence that this switch occurs in this context. Oh no, some dusty old tomes got destroyed! Compared to other events of the time, piddling for human "utility." But burning books lowers the status of academics, which is why it is considered (in Haidt-ian terms) a taboo by some - including, I would suggest, most on this site.