My two cents, for what it’s worth (nothing at all really
![Slightly smiling face :slight_smile: 🙂](https://cdn.jsdelivr.net/gh/joypixels/emoji-assets@5.0/png/64/1f642.png)
)
I think Charles has known something major was up with his health for a while. And I suspect Catherine’s been having gut issues for a while now also, and knew ‘at some point’ she would need major surgery.
So with the knowledge that Charles’ illness might be a life shortening one, Catherine and William have chosen to sort her problems now. I suspect she’s wearing a colostomy bag, and she doesn’t want to be out and about yet (don’t blame her) until it’s sorted.
And knowing things would be much more hectic when William is king, they bit the bullet and did it now whilst they can.
TLDR, William may be king earlier than expected, so he and Catherine are sorting out health problems now.