Tell that to my mother. I'm serious here: it's easy for you and me -- heck, I'd just collect it via DBus, reverse Spotify's local storage or scrape it from the web player. But that takes effort and expertise, something very few people on this planet are both capable of and willing to do, unless it's clear that the service is going out of business soon. Furthermore, hacky exports like this will not be importable on other services either.