If the argument is, "but this doesn't jive with TNG-Crusher nor movie-Crusher," I can totally buy that as a valid criticism. However, I'll counter that we have consistently watched Dr. Crusher across S1, then S3-7 and Generations. From there, we get to see her deal with the Borg and crazy-Picard in First Contact, the whole Ba'ku crisis in Insurrection, and the only meaningful scenes in Nemesis are with Picard. That's 3 brief adventures over an 8-year window, then we catch up to her 22 years later. It's plenty of time for her to grow and change, even if in the wrong direction a bit.
She's not the first woman to hide a son from his father. In her mind, she did the right thing, at least up until Picard lost his senior-synthetic shit and rightly so.