It's relevant in the context of the people who dramatized her work. In theory, coming from someone like her, they should have shown it the respect it was due. But the Hollywood narrative that also erased the good uses of guns from Schindler's List had to be maintained at all costs.
The original book, Schindler's Ark, was written by a man (Thomas Keneally), as was the screenplay (Steven Zaillian).
Putting that aside, you seem to be under the impression that there's some kind of Hollywood conspiracy, when in fact when you're adapting a novel you usually leave out a bunch of stuff. You stick with what's important. Despite what you might think, Schindler's List is not meant to be read as a story where the gun is the hero. You would be rather missing the point of it to take that view.
