Look at the gigantic quantities of utility involved in hypothetical but practically grounded futures involving AI-assisted mankind reaching merely the rest of our galaxy, and according to which the most important thing for everyone to do right now is either work on FAI or donate to the SIAI. Is that a reasonable calculation, or a Pascal's Mugging?

Personally, I rate that as not being a reasonable calculation - though I do think that machine intelligence is an important field, which people should consider working on, if they have an aptitude for it.