I think a very interesting aspect of this idea is that it explains why it can be so hard to come up with truly original ideas, while it is much easier to copy or slightly tweak the ideas of other people. Slight tweaks were probably less likely to get you killed, whereas doing something completely novel could be very dangerous. And while it might have a huge payoff, everyone else in the group could then copy you (due to imitation being our greatest strength as a species) so the original idea creator would not have gained much of a comparative advantage in most cases.
I think a very interesting aspect of this idea is that it explains why it can be so hard to come up with truly original ideas, while it is much easier to copy or slightly tweak the ideas of other people. Slight tweaks were probably less likely to get you killed, whereas doing something completely novel could be very dangerous. And while it might have a huge payoff, everyone else in the group could then copy you (due to imitation being our greatest strength as a species) so the original idea creator would not have gained much of a comparative advantage in most cases.