Oh, I believe them when they say the lanterns can be drowned out. The bonfire is huge, tons of lights in one. The lanterns are a tiny fragment of that kind of light. I can see why they'd be swallowed up by a whole lake.

[But maybe it's easier for him to understand as someone who would only have to set foot in said lake and be rendered totally useless. Rain he can deal with. Bodies of water, not so much. Still, it has absolutely never stopped him and he's not about to let that change.]

Doesn't mean we shouldn't do it anyway. I agree, they've sounded like they're arguing too hard for our safety when otherwise Robin in particular doesn't seem to care about killing us.