Note that your “tl;dr” in the OP is a stronger claim than “these empirical claims are first order while the moral disagreements are second order.” You claimed that agreement on these empirical claims is “enough to justify the core action relevant points of EA.” Which seems unjustified, as others’ comments in this thread have suggested. (I think agreement on the empirical claims very much leaves it open whether one should prioritize, e.g., extinction risks or trajectory change.)
Note that your “tl;dr” in the OP is a stronger claim than “these empirical claims are first order while the moral disagreements are second order.” You claimed that agreement on these empirical claims is “enough to justify the core action relevant points of EA.” Which seems unjustified, as others’ comments in this thread have suggested. (I think agreement on the empirical claims very much leaves it open whether one should prioritize, e.g., extinction risks or trajectory change.)