Sure.
Your argument is that these things could not happen without people hearing about it.
Because we have heard about it, we are arguing about it.
Parse that for a sec.
Then your argument is that the BBC can’t keep secrets...but, in this era we keep learning how many secrets they have managed to keep for a long time. By definition, we won’t know about the other ones, because they are a secret.
Some of them don’t even matter. I know of one ‘rumour’ that could have terrible effect on a Who writers career, a Who writer with a massive career as a writer, and who possibly may not even know about themselves. It’s not even about Doctor Who, and goes back to literally their first break in their current career. They are good enough and well thought of enough that they could probably brush it off fine. So in many ways it’s not an important secret.
The reason I know about it is the reason I am inclined to believe it’s not a rumour, though I would prefer it to be untrue.
It’s still a secret, despite the people involved being very high profile these days...or perhaps because.
The BBC can keep secrets, especially when they are in danger of losing face.
If you don’t believe me, look at all the stuff in recent years around pay (which obviously isn’t a secret anymore, but shows the lengths they go to) or things like the top gear fracas (the exact circumstances around Clarkson at that time trickled out years later, the story having been carefully controlled at the time, and are still something you end up having to look for, rather than having been screamed from the rooftops of the media at the time. And that show was making more money than Who at that time I believe. For BBC Worldwide particularly. Which is now BBC Studios. Which makes it even easier to hide things.)
No organisation as old as the BBC doesn’t know where the femur filled cupboards are, and where to bury them.