The currency of open source is
time. Time is a zero-sum game on open source. Choosing to spend time on one task means choosing
not to spend it on another.
Rust seems to spill an awful lot of words (which I translate to time) going "Look at US! We're magically delicious ... errr ... socially conscious! <jazz hands>".
However:
1) It's not my call as I'm nobody important to Rust.
2) The only downside is time. And maybe a couple of eyerolls from us old fogeys.
3) And, hey, if it cleans out a couple of real jerks or prevents one from joining then it's probably a net win on time.
As I said, "<shrug> Whatevs ..."