I view ad targeting as good for the world: they help make my life better by aiming me at products and services relevant to my interests and needs, sometimes when I didn't even know such a thing existed. It saves poor reinvention of the wheel in so many cases.
And FB-the-social-network is also great in theory: groups help you make friends and go deep into very niche interests. Without it, I would be a more normal, less interesting person. Now, with the join of a group, you can immerse yourself in a hobby even if absolutely nobody in a hundred miles shares that interest. It helps people go deeper on what they care about, thus becoming 'weirder' or a more fulfilled version of themselves. And helps people get ads they care about.
And FB-the-social-network is also great in theory: groups help you make friends and go deep into very niche interests. Without it, I would be a more normal, less interesting person. Now, with the join of a group, you can immerse yourself in a hobby even if absolutely nobody in a hundred miles shares that interest. It helps people go deeper on what they care about, thus becoming 'weirder' or a more fulfilled version of themselves. And helps people get ads they care about.