You're correct that they cannot do much to change domestic law. I'm glad to see some sensible commentary here.
On the other hand within this mindset what they can do is put pressure on other bodies. In this case it's pretty clear they are putting pressure on both the Library of Congress and the FCC. If either of those bodies take a step in the direction we want then it would be a much quicker process than going through the entirety of passing a bill through to being a law.
Something a lot of people seem to be passing is that bills are typically large behemoths when they go through the entire process. They can be sweeping an powerful but due to the process of committees they go through there are often unforeseen items tacked onto the bills in an effort to further various platforms (be they legitimate, pork, or lobbied).
I personally really appreciate the route the White House seems to be taking with this as it would prevent the muss and fuss of the entirety of Congress while potentially making for a quick and reasonable change.