A virus has no aim, no agency but just a chemical propagation(DNAs, RNAs). Still, it accounts for millions of deaths and horrible nature.
Rabies, for example, is a very deadly disease with a fatality rate of 90%. One of the terrible symptoms of this disease is Hydrophobia(fear of water). I can surely understand the fact that the victim cannot drink or fear water because virus controls it to as water reduces the chances of transmission.
But why transmit in the first place. If a virus is still aimless like a rock on the ground with the couple of DNAs, how it evolved to replicate and reproduce.
If a virus being inanimate did it, why can’t a rock or any other aimless non-living thing do it?