Given that the whole point of the website and the discussion is the fuzziness that any such rule implies, I'm pretty sure they _do_ see the point, but decided to play the interpretation game anyway. What's your point?
Your list of altitudes didn’t go high enough to change the answer. ;) Drones (in the US and the UK) must be limited to 400ft/120m and are still considered “in” the airspace of the ground they’re over. Commercial aircraft flying at 35,000ft AGL are not considered to be in the airspace of a specific park or private property when over the U.S. (and most of the world, I suspect), but they are considered to be inside the country’s airspace, since park & private property airspace has a limited ceiling, but country airspace extends up to space.
Let's say we imagine a dome over the park which is geometrically a convex hull that encloses all the tree tops. Everything in that dome is in the park.