Earlier quoted context omitted.
This is true. It’s also true that “your body” is just a social construct. The rabbit hole of “property is just an idea” doesn’t end well for humans who seek agency.
Land exists independently of your labor, predating and (hopefully) postdating your existence by billions of years. Your body does not.
"Your body" is a hierarchy of cells, cellular processes, and organs, all of which consume energy. And in increasingly many cases, "your body" has prosthetic augmentations or very difficult to produce medicine, without which you will cease to survive. If you can argue that those things are "human rights", then I can easily argue that "human rights" include shelter, peace of mind, a basketball court, ad infinitum. Perhaps more accurately: property is simply an extension of humanity that is granted by other humans. Again, taking away "property" won't end well for humans who wish to control their destiny, as parts of "your body" could gradually be deemed "property" and now you're at risk of life and liberty.