I hear ya just fine, benzyme. But scientists, just like me and you, are losing their head in this game in which they're trying to find a GLOBAL law for everything (the answer to everything). That's the end purpose, wouldn't you say? Now, for a simple dude like me, that doesn't seem to be the way the universe works at all. I might be oh so wrong, but I'd rather spend the time that I have working towards things that will matter of factly help me in my day to day life. So who cares where we came from? If some alien race manufactured us, then what? Then everything can evolve, because "now we're ready"?
What we humans are absolutely great at is discovering how stuff works relative to one another. That's about our biggest progress. I understood a lot of those concepts simply by understanding my own human nature and the way that I work in day to day life. It's cool stuff, but it doesn't take millennia. And I find most of it pointless in the end. Like time. Sure, that's a great thing, but it doesn't really do anything. I'd be just as happy without having to measure time, but it wouldn't be that easy for the employers to call they're employees to work without it.
The questions "where did we come from" or "who am I" simply stem from the need of the human being to "escape" this, believing there's some sort of escape from it. Bad luck, we ain't got any of that, speaking strictly about what we can relate. Maybe death is an option, but since no one ever lived to talk about it, it'd be pretty hard to say what goes where. The attempt to understand something of which you're missing half is never going to render the result of understanding everything, though.