It is a mistake to think that what you believe is "obvious" is obvious to everyone else, and that people agree on a "basic meaning" of words that aren't used in everyday conversation. (Observe and count the number of times the word "sovereignty" comes up in conversation in your daily life.)
You are of course free to pretend that legalese and case-law should dictate the use of ordinary words — to the point of ascribing malice to those who don’t do that.
I never ascribe malice to anyone who makes an honest mistake and doesn’t continue to double down when corrected, insisting they’re right or that they meant something else and everyone should have understood them somehow. There are lots of smart people here from all backgrounds and it’s good to defer to others who are better informed about a subject (and I’m no exception).