The Human Body Is a Cancer-Avoidance Machine, and That's Why It Falls Apart
Why is the human body so crap except for the liver?

Dynomight argues that the body's many frailties—fragile kidneys, no limb regrowth, cellular aging—are not design failures but deliberate trade-offs to suppress cancer. Telomeres shorten on purpose, and regeneration is limited because rapid cell growth invites tumors. The liver is the exception: it regenerates because it faces constant toxic exposure and must repair itself, even at the cost of higher cancer risk.
Letting the telomeres get shorter is not a mistake. It is a deliberate design decision.