One was shown decades ago, was developed and prepared for us... another was played... the 2 may have similar operation, but only one had construction..
if you still can't get that through your head, don't quote me anymore... I don't want to be teaching basic interpretation to others.
"Interpretation". Therein lies your problem. You simply can't comprehend what you are taking about.
Internal Destruction Haki was not a concept when Rayleigh destroyed Camie's collar. It was just "Haki". That's it. Nothing else. No armament. Not conquerors. No observation. It was all one thing.
Oda then went back and took pieces of it to make it what it is today at the end of pre-timeskip. Even then, Armament wasn't even remotely what it is now and that armament became higher level haki. Conquerors Haki is a 600 chapter application. Internal Destruction or "flow" Haki only was introduced in Wano. Luffy learning to combine these 2 things mid fight is actually great character growth and shows his genius when it comes to fighting.
It was entirely set up, and has the written parts already there for people to understand.
Sorry I "interpret" this differently from you. And I'll quote you as much as I feel like lol.