Parent is down voted but mostly right. Thousands of plant species are invasive and even dangerous for house foundation: japanese knotweed, running bamboo, kudzu, mare's tail. They're almost impossible to get rid of. Even unchecked wisteria can lift foundations and crack a house's walls. Animals can be even worse: carpet beetles coming from disturbed bird nests can easily infest your wardrobe, same for the many species of clothes moths. It's very hard to get rid of them without ripping up your carpet and putting all your stuff into sealed bags for years. Wasps and bees are minor threats, but they can still be a nuisance if they decide to nest in your wall, or in your chimney, or in your loft. Biodiversity is good until you keep an eye on it. If left to itself, it almost always tends to do damage.