You're absolutely right, but how would we avoid talking about it if we wanted to?

Religions are typically anti-reductionist in some way. You generally can't can't discuss how to take reality apart into pieces without conflicting with someone's religion.

Religions typically specifically deal with eschatology. There's little room for agreement about instrumental rationality or existential risk if your utility function is overwhelmed by "what happens to their souls for eternity after death" or if you consider the fate of humanity to be an actual fate decided by higher powers rather than our own actions.

(There might still be room to talk about religion more politely, though.)