Personally, I don’t see any of the aforementioned organisms as a problem, including Christine.
symbiosis isn’t new to the planet. Species have been sharing for longer than we’ve had gardens.
Bring a plant into the garden and it most likely the will introduce all the organisms that live on and from it.
Mealy bugs and ants get along quite nicely. Food for the ants and herding for the mealy bug. Like us and cows.
living in the tropics of Australia is a nightmare for gardeners. Fungus, moulds, microbes, invertebrates, and even a few vertebrates will take up residence and feel happily on the patch of greenery we call home. They might even move into the house if the climate gets a bit severe.
my great grand daughter and I are content with observing without disturbing. After all, it’s only a pest if we don’t want it.
Flipping over the fluff on a leaf and finding a cute bug is exciting for a 75 and 11 year old. Grasshoppers munching, worms feeding on grass, beetle larvae burrowing, moulds sliming across a wet lawn. It’s all part of having a garden in the first place.
Eave the garden to fend for itself.