That’s true, but I don’t think it invalidates anything about the post you replied to. It’s not a question of who invented what. The case is that the job of the founders WAS to invent the constitution and the structure of the government and all that.
The second group’s job is to read what they wrote and follow it. And sometimes there’s wiggle room in interpretation and settling that is their job too. But they don’t get to make up new laws and amendments just because the result of doing so is desirable for them.