I read tons of insightful ideas on this forum, but every now and then one is like a lightbulb going off, and I feel like I really get something that I had never fully appreciated. This is one such comment.
The way D&D typically handles multiple deities is really odd. It's kind of polytheistic, in that there are tons of different gods and no one really denies that they exist. But it is treated more like competing churches in, say, Wisconsin, where each person is exclusive to one particular faith. That's not how polytheistic religions typically work; usually folks in a polytheistic society follow all the available gods, focusing on the ones that are particularly relevant to their lives at that moment. Even the holy people, though perhaps aligned with a particular deity aren't necessarily in an exclusive relationship, so to speak.
I've been running polytheism more like competing monotheisms. I'm going to change that.