I mean, “obviously causing damage to our health”

The issue with that is the question “And do what?”

Like what matters is that you do something that is actually healthy for your body. Internet is if anything probably a step up from the age of couch surfing on the TV, since you at least need to actively navigate it. Mostly meaning to say that you could easily just choose something that isn’t any better.

But either way you’d be better off just choosing something healthy to do, like exercise.