Nope. The species has no utility because it has no identity. It would be better to precisely the amount of the sum utility of the very few, very traumatized survivors. So it is a paltry payout on an expensive insurance policy against a hopefully unlikely eventuality with quite a low chance of paying out.

I figure most threats that take out planet earth would end any plausible space presence as well, as they suddenly find that the control chips for the water purifiers need replacing and were all made in the republic of korea or similar outcomes.

.. Look, space industrialization and exploration are cool, useful and interesting. I would really like to see solar gravity lens telescopes, and there may indeed be industrial processes that are most sensibly moved offworld where accidents cant impact any ecosystems. But the whole "Eggs in basket" argument? It is just not very good, and the things worth doing in space cannot meaningfully be considered charity unless you so class the entire scientific endeavor, so this is just one of the many aspects of human existence which fall outside the purview of EA.