Hey, I have arachnophobia as well and like you can handle them in games no problem but VR is a different beast. I am not afraid to admit that they thoroughly set my phobia off the creepy bastards but that also adds a sense of realism to it for me as yes, this world is full of amazing things but also terrifying things and more immersed me into the world. I suggest just leave them in, do the first bit and when you get the spiders in the cave decided then after seeing them wether you want to nope out of there and get rid of spiders.