It's easy to see how "the Internet would become a noticeably nicer place" could be true while "some of the world's [previously] most popular services would operate" could be false at the same time.

That’s a cousin of the broken window fallacy, I am not sure it has a name, though.

How would the horse merchants operate if everyone used cars?

How would window fixers survive if there were no stones being thrown?

They might not be able to. But popular doesn't mean necessary or good.

We'll survive without Facebook or YouTube.