To me the crux of the argument is that the environment of a new lifeform isn't constant. Indeed, it's pretty much guaranteed to be different for every live entity. One beetle may live a happy resourceful life, another one may get hit by an asteroid.
Lifeforms aren't provided equal opportunity by the universe. The default state is one of unfairness. However some intelligent lifeforms like primates, and indeed humans, have taken it upon themselves to artificially move the needle towards more fairness.
I too would like to see more fairness. I also think that things are unfair by default, and I don't consider this as moral justification for social policies that keep it in the natural unfair state or worse. While I don't know @adventured's moral policies of whether unfairness is justified, I have re-read the comment a few times and I still see it as purely a description of the situation with no moral judgement at all.
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[1] It's possible that we're having trouble here due to semantics. When answering why life isn't fair, both my arguments and seemingly @adventured's entropy argument are talking about life as a sub-phenomenon of existence (which is to say, the widest scope). However if we're talking about life as limited to social structures, then I can see how any talk about natural unfairness can seem absurd.