I literally cannot avoid sinning; so, why...

[Bucky Ball]

It's not. Millions of species evolved and thrived for many millions of years.
Evolution doesn't care about individuals. It promotes survival of species.
We are indoctrinated with the notion of "individualism".
It hasn't always been that way. Individualism came from Greece in about 500-300 BC to the Levant.
It's actually why during that period, the Jewish prophets began to insist on monotheism, an individual deity.
Before that, Israel was polytheistic.
Before that, "immortality" consisted in the continuity of the male line.
That changed with individualism.

Most of those species that survived got wiped out.

Not for a long long time. Maybe their jobs were accomplished.
You are correct, ... I may have heard 98% are now extinct. 
There are now 8.7  million species still alive. Evolution doesn't care.
Humans *need* to find meaning. It's very understandable. It promotes survival. Growing up means that's not always possible.