Why are some people petrified of spiders, yet perfectly fine with cockroaches?

I never understood that. I myself of scared of all bugs, so when I see that someone is scared of spiders, yet isn't scared of cockroaches boggles my mind. The biggest spider you'll see in a normal home too is like the size of a quarter or something, but a cockroach can like be the size of a freaking iphone. Plus they are super fast and extremely ugly. I believe I have arachnophobia, so if I seen a spider of any size in my house i'ma be freaking out. But if I seen a cockroach the size of a *** iphone? I'm moving to the north pole.

Well my though is cuz spider will hurt you and some of it can be deadly poisons… Not like cockroach they are just ugly and disgusting DIRTY so that why people don really scared of it… As for me my dog and cat do the killing job for us haha… So no cockroach in or out the house