And do you want your gut bacteria to be part of you? Only the part of them that doesn't make your stomach upset when you eat <something>? Though I instinctivel

And do you want your gut bacteria to be part of you? Only the part of them that doesn't make your stomach upset when you eat <something>? Though I instinctively think this definition sounds good, I think in the case of gut bacteria it doesn't hold up. They are an integral part of our well-being, but if we could engineer them to only respond 'positively' to food, surely we would. And yet, I would not say that those bacteria that make my stomach act up are less a part of me than the bacteria that don't.