It's a requirement to respect the lore of the site when submitting to codex. Why are we allowing people to come in and just ignore what people have done before? Might as well say "Congratulations, your story means nothing now!"
It has never been a requirement. Do you know how many contradictory threads are written all the time on chaos?
Here's a list of 'destroyed' worlds that many people don't know about despite the big threads and codex subs around it:
Mandalore, first time (razed by Sith)
Korriban, first time (pelted by hyperspace asteroids)
Mandalore, third time I don't remember the specifics of the second (stripped mined by sithspawn)
Fresia (whole planet reduced to blood soup)
Countless others. It hapoens all the time. There are dozens of threads with it, but most people will never know these because it happened a decade ago.
It's not disrespectful. People just don't know these things. People weren't here for it, and shouldn't be beholden to something a stranger on the internet decided years prior. That's always been Chaos.