Whether a hive is maintained by a beekeeper, or a feral colony in a tree, it is a ecosystem unto itself. With mites, roaches, etc. Some are harmless, some beneficial, and some detrimental. The bees will handle (if you have good bees) the ones that are detrimental. The others you can ignore. Like earwigs.... ;) They are harmless.
Think "natural". I have neighbors that keep manicured lawns, wash the car weekly, and are neat freaks about everything in their lives. They tend to make bad beekeepers. Hives, like your backyard, are diverse places,..... or at least it should be. ;)