Even a VIRUS is LIFE.
LIFE doesn't see anything else.
It just wants to survive.
LIFE only goes with what works, or there is NO LIFE. It has to EAT.
But LIFE can be a very picky eater.
And LIFE doesn't care what it kills when it's hunting for food.
Specific FOODS create specific proteins from VERY SPECIFIC eating habits.
Some eating habits are very SOCIALLY SPECIFIC.