You can do better solving a terrible problem that does exist than solving a sci-fi problem that doesn't exist.
I know it's usually uncouth to compare different charities like this, but that's exactly what Effective Altruism was supposed to be about, and this cause directly competes with curing malaria.
If more than zero AGI technology starts existing, we can re-prioritize. It makes no sense for a field to go from not existing to superhuman performance without anyone noticing.