I wouldn't worry about it too much ... learning Rust will give you an edge on learning other languages and frameworks which is the more essential skill in the long run. On the other hand, smart people who have an unimaginably in-depth knowledge of a language and its compiler will also always have objections about its development and ideas on how to move forward. Being unsatisfied with the status-quo is a big part of why languages like Rust get developed in the first place.
I know I used to crush hard on Python and also got worried when there were dissonances within the Python Foundation. But as you progress, I assume the goings-on in certain language communities will take a back-seat to thinking deeply about how to solve the problems you are professionally tasked with. At least that's my experience.
As for Rust: It's gonna be around for a while. For the past months, I've been hearing a lot of chatter about how companies are using Rust for the first time in production settings and how their developers love it.
Although you are absolutely right, I think the point the author is trying to make is more melancholic. He's grieving about a loss of significance of the craft he has devoted so much of his life to. He's imagining software engineers becoming nothing more than a relic, like elevator operators or blacksmiths.
One of those is not like the others. Elevator operators disappeared entirely while the blacksmith profession morphed into the various type of metalworker that we still have today.
