If you presume that there was no conscious intent involved in the evolution process, then of course there can be no conceivable purpose - based upon this presumption.
If you don't come with a preconception and you look at what's been produced - from viruses through various bacteria that survive in an incredible range of disparate environments, through the various kingdoms of algae, plants, fungi, invertebrates, fish, amphibians, birds, reptiles and mammals... what evidence of purpose do you find?
The only conceivable goal in any unguided evolutionary process would be survival, which in itself would be an unintended consequence to naturally occurring events.
Survival sufficient to allow procreation, technically, but broadly yes.
Yet we have the concepts of meaning and purpose occurring within our human conscious awareness, together with the means to interact with our world to bring fruition to these concepts of meaning and purpose.
You can say the same about shoes, that doesn't make shoes some sort of end-goal of creation.
So we can show that meaning and purpose exist in reality, but the big question is this:
If you can, please do... don't claim, and then claim that it can be shown, and then carry on as though it has been shown, you're not the Penn and Teller of philosophy.
Are the concepts of meaning and purpose just an unintended consequence of a blind evolutionary process, or are they an integral part of the reality beyond human understanding.
Well, if you think it can be shown, show us. Otherwise, in the absence of any strong evidence that it's for a particular purpose, it's reasonable to presume that it's just something that happened.
O.