Commercial Windows licenses aren't typically covered by the equipment installers (or if they are, the cost is passed on to you instead of subsidizing it), have expiration dates, and you'll want security updates.
I think the comment had the implication that the system would be running on Windows if not Ubuntu.
So many studies say this will lead to far less productivity for anything remotely knowledge work, especially over a long period.
Meanwhile smarter companies are going to a 4 day work week. https://www.investopedia.com/four-daywork-week-study-success-11777896