It sounds smart because it is backed my empirical data. Do you think we are not aware that other life forms exist in the galaxy?
As for your symbolism, there is no 'host'. The closest thing to that could be ascribed with such a term is the planet itself. With or without humans, the planet would be on the quick path to destruction so it is pointless to theorize on whether humans are parasites or not.
[Anon Text]
As for your symbolism, there is no 'host'. The closest thing to that could be ascribed with such a term is the planet itself. With or without humans, the planet would be on the quick path to destruction so it is pointless to theorize on whether humans are parasites or not.