Certain songs will get taken down if you stream them, but they're still licensed.
https://beatsaber.com/faq.html
> Our aim is to release Content ID-free songs for future OSTs as well. However, we cannot guarantee that Content ID will be disabled for paid music packs since they are owned by our third-party partners. We value the work of artists and respect their decision to keep Content ID enabled for the music they create.
https://edm.com/features/inside-the-ambitious-quest-to-licen...
> The ambitious effort to activate Daft Punk in Beat Saber took over two years, according to Vickie Nauman, founder of the Los Angeles-based consultancy and advisory firm CrossBorderWorks. "The collaborative effort was between Beat Saber core team, Warner Music in London and Daft Punk crew," Nauman tells EDM.com.
> Nauman has worked with the title's developer, Beat Games, to execute the company's licensing deals since its early days as an independent gaming studio in Prague, a role in which she remained after Facebook (now Meta) acquired the studio in 2019.
You won't get sued for that just like singing Taylor Swift in the shower is permissible.
And I am thankful they do!
There's zero liability for Beat Saber or Meta here. People distributing the pirated music would be liable.
Maybe someday one will be released with Spotify, YT Music, and Amazon Music integrations. Advertising that you just need to connect your accounts and can use anything. But I'm sure there are a lot of people working to make sure that never happens.