That's a pretty silly thing to say.
Writing code that doesn't crash isn't the hardest thing about writing low-level code. Sure, it's a problem, even an important problem, but there's a ton of other knowledge that no JS developer would have. Unless by "write" you mean write 2 lines per day with lots of searching in-between that has to be thrown away in the end.
Good programmers are expensive. The notion that better tools are going to change that is naive.
Rust is good. Use it for things. But the idea that it can let people who don't know what they're doing write secure code is dangerous. For example, what does Rust do about Spectre? Does your junior-level JavaScript programmer know how to address that? What about other timing attacks, or knowing which crypto to use in which context?
People still have to know what they're doing.
I've used Rust for a while, and this isn't really true. At the lowest level you still have to build good abstractions with judicious use of `unsafe`. It also comes across as incredibly hostile, you're not doing Rust any favors with this.
Can't see how that can be. Only a small minority of programmers can code low level systems. Only those that truly enjoy it, go through the pains necessary to have adequate grasp of it.
LOL, I wish. I've been told I was going to be replaced every 5 years for the last 20 years of my career. I fucking wish they did so I could finally retire but I keep being given money and cool problems so I stay waiting for this fangled replacement who will come and take my job.