It's a cruel cycle with YouTubers- they run out of stuff to say/stuff they can authoritatively talk about, but are basically forced to continue coming up with more content in order to stay relevant and keep their income going.
On the other hand, while I didn't follow Tom Scott particularly closely, I always enjoyed his stuff, and when I learned that he called it quits, I was legitimately happy for him AND his followers -- better to quit while you're ahead than to wear out your welcome.
tldw You're basically forced to structure your thumbnails and titles that way if you want your videos to actually be seen. Blame YouTube's recommendation algorithm, not the creators.