I feel like we really are seeing how people get trapped in their wee conspiracy theory rabbit holes.
Statement comes out, people assume a planned surgery means a minor one, some mild speculation about how a 10-12 week recovery period is too much for the apparent minor surgery.
As time passes without major updates, speculation intensifies because people have leaned in hard to the idea that the palace must have been lying about a minor surgery to be out of sight for so long.
KP responds to point out they never promised updates, this must mean they're withholding information that was intended to come out, something must be wrong or hidden.
Pap image? Clearly a plant, but it's a body double/Pippa pretending to be Kate/photoshop.
Released image? Must be old! Ah, some basic photoshop errors? It must be a composite of several images/Kate's face photoshopped onto a body double/a Frankenstein's monster of combined images.
Image in the car with William? Photoshop! Old image pasted in! Body double!
We've now reached a point where video evidence of her isn't enough as it's again being claimed as a body double, proof of a face lift (because obviously grainy video will show up every fine line), or a look-alike being claimed as Kate.
I think there's a few people now who are going to be convinced she's been replaced by a body double for the rest of their lives, a la Paul McCartney conspiracy theories.