I see your point. To answer your original question, yes Canonical's military relationship is fundamentally different from Pizza Hut. More comparable to something like Palantir that sells SaaS or IaaS

So more like Google, Microsoft, Amazon, Salesforce, and most big tech companies than either Pizza Hut or Raytheon? Perhaps most like Red Hat (who also sell to the DoD)?

I think it would be unusual to call them all military contractors (as you called Canonical in another comment).