Somehow you and I are taking the exact opposite conclusions from that paragraph. He is explicitly noting that your interpretation is incorrect—that approximations are necessary because of time constraints. All he is saying is that underneath, the best possible action is determined by Bayesian arithmetic, even if it’s better on net to choose the approximation because of compute constraints. Just because general relativity is more “true” than newtonian mechanics, doesn’t mean that it’s somehow optimal to use it to track the trajectory of mortar fire.
Somehow you and I are taking the exact opposite conclusions from that paragraph. He is explicitly noting that your interpretation is incorrect—that approximations are necessary because of time constraints. All he is saying is that underneath, the best possible action is determined by Bayesian arithmetic, even if it’s better on net to choose the approximation because of compute constraints. Just because general relativity is more “true” than newtonian mechanics, doesn’t mean that it’s somehow optimal to use it to track the trajectory of mortar fire.