Well, [a wry smile] There are always mountains nearby, in the country I come from.

But -- well, you could think of it like any other creature. Among plants, there will be many poisonous, and just as many harmless. Among mammals there are those we eat or have taught to work for us, and those that would just as soon eat us. Mushi are no different. They've evolved to play whatever roles are most productive to their species; sometimes making direct use of man, sometimes aiding, sometimes antagonistic, or sometimes harming them only incidentally.