Most bugs are ugly and quite a few bite. I dislike spiders and if they are in the house, it's all over for them. Outside, they are eating other things that bug me. My wife insists on me spraying the home inside and out with persistent surface spray. It works pretty well. Snakes? Oddly enough, we see very few here. Australia is a big place and there are other places where snakes are common. They are also protected, so people tend to get a professional snake handler to deal with them. Bugs and snakes are nowhere near as dangerous as humans and horses. If we treated cars the way we see spiders, no one would drive.