Who would work on Linux if Torvalds was ousted as the leader of the Kernel Team? It would be one more project that would have died out in a sea of dead open source projects.
You aren't seriously suggesting that the future of Linux (one of the largest open-source projects backed by multi-billion companies) depends on one single guy?
That's a good reason to not use Linux
There's a much better chance that kernel writing would have been fully automated by AI or evolved through much advanced genetic algorithms by the time Linus Torvalds passes away.
Linus could die tomorrow, and then what?