I have no doubt about the part where iPhone fans waste no opportunity to tell someone else they should get an iPhone. It’s the other side of the argument that falls flat: Alice receives video from Charlie that’s perfectly fine, but Bob’s iPhone sends a pixelated mess, and Bob says the iPhone is better?
SMS fallback is not a common feature of internet-based messaging apps on Android. Signal used to do it, but does not now. I don’t think WhatsApp or Telegram ever did.