It helps us see through the deceptive arguments against anonymity. You don't think that's helpful?
Your logic essentially is, "No one can learn anything; their opinions are fixed," but that's obviously false, as we have all learned or else we would be unable to read and write and do everything else we do.
In fact, your posting your own comment contradicts your logic, as according to it, there's no point to saying what you said, since it can't change anyone's mind.