What would otherwise be the point of data portability? It's not exactly difficult to move your name, email address and IP to another provider, so why add legisl

What would otherwise be the point of data portability? It's not exactly difficult to move your name, email address and IP to another provider, so why add legislation just for these things? There is a definition from the ICO site: “‘personal data’ means any information relating to an identified or identifiable natural person (‘data subject’); an identifiable natural person is one who can be identified, directly or indirectly, in particular by reference to an identifier such as a name, an identification number, location data, an online identifier or to one or more factors specific to the physical, physiological, genetic, mental, economic, cultural or social identity of that natural person”. So for example if you draw a line in Photoshop and by the way you drawn it someone can tell it was definitely you, then this is personal data. If you compose music and through its style it can be said that this is definitely something you made, this is also personal data and so on. That's why when you request data download for example from Facebook you get everything, not just your name, email and list of IP addresses you logged in from.