How else do you want to handle a CEO owning stock? From his perspective: He sees hard times coming for Unity so he sells his stock. At the same time he tries to turn the situation around, uncertain if he will succeed.
And AFAIK the trades are public so everyone would know that the CEO is sceptical about the company's future. There are obviously problems with the ToS changes but is the stock selling really all that relevant in this discussion?
Obviously it's a skill issue but don't you ever make mistakes? If Rust prevents some bugs and makes you more productive, what is not to like? It's a new language and takes time to learn but the benefits seem to outweigh the downsides now and certainly in the long run (compared to C at least).
Maybe Torvalds didn't give in to public opinion but made an informed choice?
The crates are a bit of a problem and I think Rust is a bit overhyped for high-level problems (it still requires manual memory management after all) but those are not principal roadblockers, especially in the kernel.