Exactly. If I'm infested with a tapeworm, who cares? My intestine is the tapeworm's domicile, to occupy and furnish as s/he sees fit. It may be helping itself to "my" hard-won food, but on a cosmic scale ... so what? In all fairness maybe I'm the one being greedy.
The key point is that nobody cares, and nobody should care, whether the humans all get infected by tapeworms. That's the worms' business and nobody else's.
The key point is that nobody cares, and nobody should care, whether the humans all get infected by tapeworms. That's the worms' business and nobody else's.