Yes. I think your list of commonsense priorities are even more beneficial in the view of longtermism. Factors like “would this have happened anyway, just a bit later” may still apply and reduce the impact of any given intervention. Then again, notions like “we can reach more of the universe the sooner we start expanding” could be an argument for sooner being better for economic growth.
Does this apply to things other than existential risk?
Yes. I think your list of commonsense priorities are even more beneficial in the view of longtermism. Factors like “would this have happened anyway, just a bit later” may still apply and reduce the impact of any given intervention. Then again, notions like “we can reach more of the universe the sooner we start expanding” could be an argument for sooner being better for economic growth.