And why exactly is that considered a fact?

The closer you are to a monopoly, the more required you should be to serve all. We don't allow the electric company to kill your power because you made disparaging emails or bad messages online.

And if you're a monopoly, you should be dealt with heavy handedly. Because power and money only further power and money. Anti-competition laws stem that to an extent.

There are plenty of music streaming services at the same level of quality and within the ballpark of paid subscriber base as Spotify. It wouldn’t qualify as a monopoly.

Music streaming isn’t the kind of good that falls under common carrier so I don’t think the analogy of the electric company fits. People can easily go through life not subscribed to one. I for one only have iTunes Match which isn’t the all-you-can-eat style of Spotify/Apple Music/Play Music/Amazon Music/Tidal/etc.