There's a difference -- often a big one -- between being theoretically able to build some feature into a phone (plus the server-side infra and staffing to support it), and actually having built it. That's the capability angle.

However, the difference between having a feature enabled based on the value of a seemingly-unrelated user-controlled setting, versus having that feature enabled all the time... is basically zero. Additionally, extending this feature to encompass other kinds of content is a matter of data entry, not engineering. That's the policy angle.

When you don't yet have a capability, it might take a lot of work and commitment to develop it. But on the contrary, policy can be changed with the flip of a switch.