Of-course! That's the case with most celebs. Maintaining a blog/site cannot be Gate's personal priority anymore.
In fact, I doubt he wrote it and, if anything, might only gave it a cursory review.
I'm not sure why you think that, this sort of thing seems to be his priority for the last, what, decade?
We need a new dog-whistle term for this kind of reflexive skepticism. I propose "cynisignalling".
I KNOW that because multi-billionaires running multiple super large companies do not sit at their desks and think about PR releases or blogs or, sometimes, even have a computer on their desk. Yes, there are exceptions but I can guarantee Gates does not sit and write this up.