How is this different from evolution failing to explain it's origin, i.e. abiogenesis.
In fact, the vast majority of people, if not all, who support evolution, argue it is not necessary.
There needs to be some consistency here.
Then you do not know what evolution is about. Evolution explains that one species can and do change into others through natural selection. Evolution does not even try to explain abiogenesis. It never has made claim to the origin of life, just the origin of species.