Ah. The on average bit is what I was missing. It keeps going against my intuition though... like: on average, buyers of lottery tickets get back ~90% of their

Ah. The on average bit is what I was missing. It keeps going against my intuition though... like: on average, buyers of lottery tickets get back ~90% of their investment. I guess the difference between lottery tickets and genetics is that one is compulsory, with no benefit whatsoever for not playing.