I mean, sure, I can totally see the idea that consciousness is maybe some emergent property of complex systems... in which case, sure, we could stumble upon it by accident. That is totally possible; we're creating complex self-replicating systems all over the place.
But as far as intentionally constructing the thing that will come after humanity? we can't do that until we know what, exactly, it is we are constructing, and as far as I can tell, we're pretty far away from any idea of exactly what that is.