I think the poster might have put it this way: You aren't the parent of "millions of lives" and she is the parent of one of those injured by a "safe" vaccination.
I don't usually commend arguments on the basis of their proponents having or not having "personal experience" with or -- at least -- an emotional tie to what they're arguing, but in the case of autism it seems like it's pretty easy to tell on this thread which posters are speaking from knowledge and experience (in spite of one person's claim to the contrary).
As usual, a lot of the posters are proposing "either/or" when the issue is that there are safer alternatives to epidemics of whooping cough and the like. It isn't "either/or"; it's "there are better ways to avoid the problem." The smokescreen is the lie that thimerosal is safe, vaccines are safe and don't contain thimerosal anymore even though it's safe (figure that one out), etc.