Yes, it’s poor form, a technical violation, but not intentional misrepresentation. It still violates Harvard’s definition of plagiarism applicable to students, so they are stuck in a publicity soup.
I’d be more forgiving of the plagiarized parts in her thesis. Most scientists are pretty forgiving of graduate students, even postdocs, for such “inadequate citation”, which is indeed an appropriate way to describe her error here, much as the right wingers might have a field day making fun it as a euphemism for plagiarism. If she weren’t the hot button president of Harvard, nobody would care about the lifted sentences in her thesis, so there’s definitely a double standard both ways: on the one hand, she’s not being punished at all quite unlike how undergrads would be punished for a similar offense, but on the other hand, she is being punished with all the pillorying just because of her position for something most academics would brush off as not a big deal.