It is less to do with being "within the Disney Bubble" and more to do with recognising that there are certain subjects which invariably lead to disagreements and go downhill fast. Rather than risking that, the forum owners have chosen not to permit those topics to be discussed. There is a link to the actual wording of the rule on
this link
Here on the UK boards, our posters are generally pretty well behaved so we tend to be a bit more lenient with the rules, however if a conversation looks like it might take a turn for the worse, sometimes the moderators will step in and try to get the thread back on track.
Thank you for your understanding.