Interesting. So riddle me this.

Microsoft goes to great lengths to court primary education systems to instill themselves as the "taught software stack". You say no one has any right to Microsoft's products... Then does that not run into somewhat of a public contradiction when public education systems shove it down students throats?

In point of fact, it sounds like the publically taught option should be exclusively GPL or other FLOSS software offerings, because contrary to your assertion, every student does have an implicit right to those as a public good.

No, in no way at all is what you just described anything resembling a "contradiction". If you've used Google Docs or Libre Office for more than 5 seconds you'd know that.

If you want to nationalize Microsoft, petition your congressperson to do so.