Are humans the panspermia of another civilization?

(one response: hat question is a very strong assertion, a good proponent of science always subscribes to Occam’s razor, the evidence does not point to that being a likely cause for life on Earth. Dyson Spheres are a strong hallmark of a highly advanced civilization but a civilization that spent a lot of resources staying local. It’s an interesting thought however, one can argue that life is a self replicating machine so.. I suppose it’s open for debate!)