Such delineation is important to avoid confusion when there is a more or less even use of the term for two or more meanings.
This is not the case.
The term "throne" is used in the Bible 170 times. If in more than 95% of cases the term is used to point out to a chair with a single person sits (or, metaphorically, a supreme authority held by a single person), then that is the meaning we should stick to, and work around any other instance in which such meaning is not used.
It is obvious that a crowd cannot sit on a chair, as Rev 3:21 indicates. So, "throne" is not a chair in Rev 3:21.
Same with the term "God". The term is mentioned in more then 4100 instances throughout the Bible.
If >95% of the instances God is used as if God was a single person, then we should understand that is the standard meaning, and work around those verses in which a different meaning should be sought.