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?
Language policing slows down technical progress, very significantly I would wager.