And that's just computers. Cars and phones, man, holy crap.
To take your fish analogy, it's like "Well maybe 5% of your catch is NOT laden with innumerable parasites, but they're the only thing that lives here and we gotta eat so...."
Edit:
"But I heard there's a new breed that not full of parasites!"
"Yeah but those don't seem to migrate here and if they do they either don't thrive or get eaten by these bloated monstrosities."