Depressing facts of evolution time. Evolution will totally evolve systems where something is both necessary for the system to keep function and detrimental to

Depressing facts of evolution time. Evolution will totally evolve systems where something is both necessary for the system to keep function and detrimental to the system. If you evolve in the context of "there are tons of viruses just all over the goddamn place", even if the viruses are constantly harming you, there is no reason your body shouldn't come to depend on them for some functions. Eg, the amino acids liberated from your immune system breaking them down could be a vital precursor to some protein or another, even as they continue to hurt you. For a computer example, imagine writing programs to run on a computer that suffers frequent, intermittent power failures. You could very easily end up with a program with memory leaks that don't matter because the power failures happen too frequently for enough memory to leak for it to be a problem. The frequent power failures are bad, and you would prefer to eliminate them, but you can't because the program has evolved in the context of frequent power failures and can't run for long without them (hell, maybe the memory leaks will end up corrupting on-disk data if you fill up main memory and your hacky memory management system begins double-allocating).