Why is it unlikely? I’m certainly not suggesting aliens. Just the idea that if there is a chamber and it is unopened and contains non-stone artefacts (wood, foo

Why is it unlikely? I’m certainly not suggesting aliens. Just the idea that if there is a chamber and it is unopened and contains non-stone artefacts (wood, food, fibres, bone) we could finally carbon-date the structure and corroborate or refute the prevailing wisdom on the timeline.