This is a large chandelier in the Cathedral of St Mary of the Assumption in San Francisco. Without a doubt it is the first think you notice when you walk in. It's positioned above the alter and reflects the light from the windows of four corners. When I walked in it was all I could do to stand there and look up. I imagine that's the intended effect; to give pause and a feeling that this is an extraordinary space.
My Sony A7rII camera has a silent shooting mode. I turn that on whenever I enter a house of worship or any place where the sound of a shutter might break the mood. I try to respect places like this even though I want to take photos. My desire to get a good photo does not trump my manners or sense of reverence. As much as I love to get a good photo, I'll walk away if I feel I'b be crossing some line.
That's not to say that happens a lot. In the vast majority of cases its cool. Even if I have to take a few chances, sometimes it's better to get forgiveness than permission. But invading someone's space when taking photos is not cool. If I find someone in contemplation when I walk up with my camera, I'll walk away if I cannot capture the scene without disrupting it.
For me it's as much about the presence of mind as it is about the picture. That sometimes involves being respectful of other people's space.