Its yet another example of mumsnet entitlement - anything that may mean MY child doesn't get exactly what I want is unfair and should be changed. Examples of which diatribes have appeared here include faith, siblings, people moving house, SEN, grammars, no grammars, private, no private, ICS etc etc etc
It's easy to throw mud at individuals over their descriptions of their personal experiences, some of which are always more compelling than others. But it's less easy to ignore the collective frustration that people have with faith school admissions.
Your own position seems to be based on your experience of your own local school, which is clearly quite different to the experience of many others. Hopefully you've now at least got a slightly bigger picture.
Rules is the rules - they evolve but that's what they is irrespective of how pointy elbowed and demanding you get
They evolve through consultation and everyone here is entitled to contribute to that, either directly , or via their MP. But they can only do that if they're aware that it's happening. And if they need to hone their arguments here on Mumsnet first then that's fine.