No, actually there probably are enough people scared of them. Chainsaws are somewhat regular weapons in actions games as well, let alone movies/TV series of various kinds, like a natural addition to blades and guns. They have also been used by military and police as a method of violent entry through locked doors, although special purpose circular saws are another option. Needless to say, murderers have use them as well in RL.
Chainsaws do command respect. I have used them plenty of times, and I always remember to pay attention to various steps to keep myself safe. It's most certainly no cordless drill. Perhaps it's partially due to traditional gender roles, but I can assure you there are plenty of older women who would never want to touch one. No doubt there are also lots of city folks whom you'd need to convince to try them, though at the same time I'm sure there's also fascination in an equal amount.
Still, a chainsaw is obviously no gun in this respect.
It's a relatively normal, but still an anime world. You occasionally see that train of thought in manga. It was also present in GTO, for example.
It's a closed off world by the devil. It's possible its powers are amplified there significantly.