FWIW, I regard that as infamy rather than fame.
Absolutely. She went where the money and fame were, and was a pariah after the war ended. Justifiably. You can't serve as a handmaiden to evil and then say you were just a handmaiden.
It's a pity she didn't flee the Reich, or even remain apolitical, instead of serving it so well and enthusiastically; she was an incredibly talented filmmaker and photographer.
Even Triumph of the Will is a beautifully shot and executed film, to the degree that you can separate its technical and aesthetic merit from its glorification of evil. That's not easy to do even a little bit, and I don't think it's possible to do completely.
Her work after the war also showed great talent and skill, but the world wasn't inclined to forgive or forget. Reasonably so. If she'd used her talents to document the Holocaust after the war ended, that would have been a suitable form of atonement.