What's it they say, everybody's got one?
Your noble ethics are well built with strong arguments - in the given narrative.
Meanwhile, in the real world, there are legions of people with unused expensive SW licenses. Licences that had been properly purchased and are the sellers' property to dispose as they see fit.
In Microsoft's particular case mostly due to the provisions of their own Software Volume Licencing "Agreements" which will coerce you to buy an additional one.
https://curia.europa.eu/jcms/upload/...cp120094en.pdf