The problem with all this is you're stating the non existence of the children as a fact, it's NOT a fact only what you and some people believe. It's very easy to make pictures, newspaper articles etc fit into any theory we want to push but it still doesn't make it fact.
You're quite right, and nobody (me included) can say with certainty whether the children are real or whether surrogates were used. It's just my opinion as you say, as no other scenario has ever explained what happened and what they did to the Royal Family. They're very cruel.
Nobody ever acknowledges the children, and they are only referred to obliquely and in suspect photos. Interestingly, the report that King Charles toasted Fark's birthday at a private lunch was met with disbelief as press rubbish. What does that disbelief mean? If Fark is real why shouldn't Grandad raise a toast to him?
Whatever we believe, this is a bizarre situation for the King of England's grandchildren to be in, and this secrecy would not happen anywhere else in the world except in a despotic regime. But it has happened here in the UK, the cradle of democracy.
The children are in the LoS and have titles, but the idea that the King should wish the elder one a happy birthday is dismissed as press rubbish. This double-standard is not addressed.
The resulting confusion and secrecy is no mean feat for a deranged Prince and a hooker from Compton.