Those are good questions.

I think the primary driver is DRM, which itself is driven by the content owners more so than service providers.

While the streaming services themselves surely want to protect their service from theft, they would largely benefit (with some caveats) from having a platform that's extensible and flexible as a competitive edge, similar to how a phone vendor wants to have a thriving third party app scene.

Meanwhile, the content owners still use misguided tactics that punish legitimate users in the hopes of stopping piracy. Piracy that always seems to find a way to continue.

This leads to some good questions around what kind of policy can be made to give content owners legal rights to their IP while also respecting user's rights to build and extend.

Because ultimately the core offering of these streaming services is their breadth of content and the license negotiations and library management they do. Their apps are just front-ends to that.

So, a "right to extend" initiative that pairs with the "right to repair" initiatives could be something interesting to explore.