".. forcing competitors to make their own data exportable to Facebook would in all likelihood benefit Facebook"

What competitors is the author even talking about here? There are, as far as I'm aware, essentially no competitors left to Facebook anymore.

That being the case, I'm not sure that statement is correct at all. On the contrary, it seems like if FB were required to offer an easily exportable data format, that other services would pop up overnight to try and lure people away from FB onto their (hopefully) more privacy conscious platforms. It would also lower the bar for people to make the switch to something else, as they know their friends can switch just as easily without losing their data.

I agree with the rest of the points of the article, but I don't see how data portability can be anything but a net positive for the consumer.