All law is composed of two things:
letter and
spirit. Ex: 1919, Detroit Michigan, the advent of the auto necessitates a law. Autos shall come to a complete stop at all Stop Signs. The letter--
shall come to a complete stop--embodies the spirit--
we don't want people getting killed at intersections.
The Constitution is also composed of letter and spirit. What does the clause say, and why does it say it? The ultimate right contained in the Constitution is that of alter/abolish, in Article V. The convention clause embodies the spirit of the
Declaration of Independence in that it provides a legal basis to formally discuss our government as it exists today. Here is a Congressional Research Service report all about the Article V Convention:
http://www.foavc.org/reference/R44435_20171115.pdf
"Hi, I'm an American but I'm afraid to formally discuss amendment proposals. I can only talk about the Constitution informally on the internet. I don't deserve what I've been afforded."