Earlier quoted context omitted.
Alternative explanation in the same vane as your theory: The cognitive and time cost of compliance for language policing takes away from valuable programming and planning involved in developing solutions. (i.e. "banned words" [swear words] and politicalized words [whitelist/blacklist,etc]) Antoher possibility is the people who don't want to deal with that are gone and we're seeing a loss of their contributions.
That’s a pretty big leap IMO. What gives you that impression?
It's really not a big leap, though. People who are afraid of violating a code of conduct because they're "under the watch of language police" are basically experiencing a form of anxiety that may or may not have a basis in reality.
Being afraid of being sent to the HR DEI board because you named a process 'Child1' then ran Kill(Child1) ... or any less obvious scenario similar to that ... is not going to do great things to your ability to work.