It does make it a good thing for them. Which begs the question: why is it that you get to decide what is or isn't a good thing? Or: why shouldn't people be able to decide for themselves? The answers against the latter are, at their root, paternalistic and elitist.
> they love also facebook
Ah, yes. The old "facebook is as bad as cigarettes" trope. It feels a lot like the claims around TV in the 70s and 80s. "It's rotting people's brains!" But society kept on chugging. It is one thing to object to Facebook's business model. It is another entirely to deem it "Bad For You". Billions of people like using the product and it hasn't hurt their lives. In fact, it has improved them.