Yes, but you also described it as the strictures of "the religion", as if there is a single monolithic Judaism that universally follows that rule.

She disagrees with the way they operate; she doesn't need to justify herself either. They were able to come to a satisfactory business agreement regardless.

I think what I'm responding to is that your circumcision comparison made it sound like you're suggesting she's somehow "less Jewish" or an outsider to Judaism, when in fact the specific thing she's disagreeing with isn't a universal part of the religion.