I'd agree with everything you said, but would add that "purpose" is an unnecessary term. I think "result" is all that is necessary. The boichemistry of life results in the ability and drive to reproduce, and the increasing complexity brought on by evolution results in progressive degrees of intelligence.<quoted text>
I speculate that the "purpose" of an individual is to perpetuate the species and that progressive degrees of intelligence is purely a successful reactionary adaptation toward that end.
I further speculate that mystical/religious/new age gobbledygook is nothing more prodigious than mental masturbation.
I think that the idea of purpose is just fine as a human construct. It is necessary for holding social groups together, but is also very subjective. Those who cannot envision their own sense of purpose must rely on classic examples handed to them by social authorities.