Stallman's statements about how the person controlling nonfree software "is your master" are important, but they don't go far enough. The problem is not just the controlling of abstract intellectual property like intellectual property rights to particular software. The problem includes the actual control of how services are provided. When the provision of important services --- be they auth, email, banking, groceries, whatever --- is concentrated in a few hands, those hands become masters of many, regardless of the software licenses involved.
> The problem includes the actual control of how services are provided.
FSF has opinions about SaaS which they call SaaSS (Service as a Software Substitute).
https://www.gnu.org/philosophy/who-does-that-server-really-s...
If Android was AGPL without source assignment, this wouldn't be an issue.
Thanks to the anti-tivoization clause manufacturers are required to provide you with the ability to run your own code on the device, without any restrictions, so you'd have a guaranteed right to root the device and sideload your own apps, without something like SafetyNet being able to figure it out.
The people writing the software need to eat and if they can't do that it doesn't matter what the license is, the software won't get written and no one will be able to use it. Moves like this thing by Google are about economics rather than licenses or abstract ideas like "freedom". A world with ten gazillion closed-source programs competing would likely be more free than one with tons of open source software but only one company that can pay a living wage so that people can work on that software.