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Hello, some rambling.
The more I do my own research and listening into the front-line minds working on AI, I keep thinking that life in itself may just be a "mercy" and species are meant to go extinct not in terms of dying off but evolution.
E.g assuming 100,000 years from now in a post ASI era, where humanity are more or less gods, people will be assuming different forms, a ball of plasma, a being made of nanobots, a three headed hydra. Eventually as more time goes there becomes a less of a need to breed, and those people already living will want to try different forms, eventually there will be a point in time where there is no one resembling humanity one bit, at that time, what is it that still connects us? Is it fair to assume that humanity rather then a species, is more of an ideal?
My point is that humanity as a species is destined for an evolutionary extinction until only its soul, the ideals it has are left, and even then, just like the big bang, every former human with different forms will eventually keep to themselves in their own multiversal bubble, slowly drifting from each other a sort of social entropy.
Maybe this is why we find it hard to find life, no race or species out there will ever need so much resources, it would be foolish to assume they don't have AI assisting them by the time they can traverse stars.
They would be more then capable of tapping into the vacuum or some energy invisible to us, to power their needs.
My point in this take I am trying to make is, humanity as a form and eventually an ideal is destined to vanish, even if humans so to speak, survive and become technological gods, and that I believe every species with AI that manages to get ASI, realises this, which negates a need to spread among the stars, because they already have limitless energy to do whatever they desire.