I'm not sure I see the waste here. Most people I know spend several hours each day doing things that will literally accomplish nothing. If you're arguing that effort is being wasted here, then I'd say your effort is being wasted on this issue, rather than, say, campaigning for the abolition of music and television and whatnot.
There are far smarter places to recover this spent effort, if that is your actual concern.
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.
Go read what the rust devs have written. They've spent a nearly insignificant amount of time on the issue of community diversity. One post among thousands, and we all better turn up the heat, because "oh my, the wasted effort! They used words that I didn't want to hear one time!"
If you're going to criticize how people spend their time, you'd better bring actual facts about how their time is really spent. One blog post and a few side discussions does not constitute a time investment problem. All you have here is a basic polite courtesy, and that's not something to object to.
There are far smarter places to recover this spent effort, if that is your actual concern.