Do you often conquer a city and leave it as a foreign religion? I usually flip it to my own. Frankly Hero Worship has no niche, its just really bad. I understand that you see it as, this rewards conquering, and I plan to conquer, but due to the numbers and the types of yields the other beliefs are overall just better. I'd compare this to Pokemon battles (sorry if it doesn't help). Its like Electivire, which is one of the only options for a physical electric type. So it sort of has a niche as a physical electric type, but in practice that niche is just pointless, there just aren't situations where its better than other choices. Holy Law works for just about any type of empire, Theocratic Rule works even if you aren't heavily going for WLTKD, Transcendence works for any empire style. If Hero Worship is the last belief, then yes of course you take it. But you said you its go to belief, which is very different than taking it because the other options are gone. I feel like Way of the Pilgrim is pretty bad as well.