It might help your case, even a little bit, to use the appropriate terminology.
A COS is an Amendments Convention. It’s sole purpose is to propose Constitutional amendments to the CURRENT Constitution.
A Constitutional Convention’s purpose might be to propose a brand new Constitution.
None of the COS-minded folks I’m aware of here at FR or elsewhere are considering anything like the latter Constitutional Convention.
If ANY convention called to amend or replace the Constitution choses to replace the whole thing, and 3/4 of the states ratify that, we get a replacement Constitution. That is what happened in 1787 and it can happen again. 3/4 of the states can do anything they want with the Constitution.
Lawyers and reality do not coincide. I was a civil litigator for forty years.