"in C# or Java" ?

where do you even base these claims? Do you know what C# and Java threads have that Rust doesn't? data races. And don't get me stated on the biggest paradigm failure that is OOP.

Memory leaks are not considered memory errors in Rust and they are allowed.

What you don't understand about what you call "pro-Rust crowd" is that there is a reason to push for memory safety and encoding the invariants in the type-system. It's the closer you can get to a mathematically proven system.

If you don't want one of your most core systems to be as robust as possible against security vulnerabilities, even if that means going out your way either learning something unfamiliar or god forbit communicating, like you have more emotional quality than a potato, with other people then you are a horrible person.

It's unreasonable for educated grown men to react like 12yo children and resist change cause "we don't like eating our vegetables even though they are good for our health". If you actually care about the Linux kernel you will find a way forward even if that means communicating with people or even changing habits.

At the end of the day I don't think that the people that are contributing to the Linux Kernel do it out of good will but rather more about than prestige and building a resume. Or else we wouldn't have this resistance to progress.