Then you’re just empirically wrong. I’ve never had managers who didn’t want me to have professional communication skills in the ten years I’ve been in our industry.
I’ve also been a manager at 3 different companies, one of them my own, and my philosophy has not been to push deadlines or work, but to spend more time understanding requirements, and simply try to break down long-running projects into small pieces that can be estimated more accurately. One of the biggest problems I’ve witnessed in software is that estimates in units of years are always very wrong, while estimates in units of days or weeks are pretty good.
I have to agree with the parent; you’re making incorrect assumptions and maybe projecting your own bad experience, and ending up accidentally saying something that isn’t true.