Counterpoint - humans are very much not mediocre, we really are special. No other species is as advanced as us, no other species is as capable as us and no other species is as awesome as us.
We may one day discover intelligent alien life, until then the blue planet really is special. Okay it may not look like much, but looks can be deceiving.
Indeed - it's not very flexible! If anything the principle says that nothing is more important than anything else. Which is humbling and a good thought experiment, but I ask whether we can actually go about our lives using it.
We may one day discover intelligent alien life, until then the blue planet really is special. Okay it may not look like much, but looks can be deceiving.