What you're saying largely lines up with the content of the post, assuming you extend it not just to words but to all "declarative" actions (symbols etc).

The added wrinkle is that the act of claiming something as reality itself is such a declaration, and so is the claim of history. It may be tempting to assume that there is an actual reality outside of declarations of reality, but that is something we can never know, since knowledge is also a set of declarations. No version of "memory" as we know it can extricate itself from this necessity to be declarative. One can claim a reality (or a version of memory) outside of one's knowledge, but of course that raises the question of how the person claiming anything about it knows what they claim.

Ultimately, all memory, all acts of remembering fall under the aegis of this moral obligation to others, because it is all declarative. If that's what you're proposing then that aligns nicely with the content of this post.