Growing up in the North Carolina country side I remember being able to stop anywhere on our property look down in the grass and find a wolf spider. My father almost cleaved his own face in half with a machete because of a writing spider.
"There's a good chance at least one spider is staring at you right now, sizing you up from a darkened corner of the room, eight eyes glistening in the shadows."
So...
Scenario A: Spiders exist, eat the equivalent of one humanity in bugs per year.
Scenario B: spiders do not exist, we drown in one humanity equivalent of bugs per year and growing.
I dunno about y'all but I'm exceedingly happy with scenario A. Spiders are cool.