I agree with you, and I just wanted to point out how, in earlier times, greed was consideres as something abhorrent, while in modern times, it is well-embraced.

The thinking “how do I be most successful”, however, has a lot in common with greed. And game theory describes exactly that. Capitalism is just the practical aspect of greed. Saying that viruses get less dangerous over time is correct, still they are more dangerous than no virus at all.