It's worth noting that graphene doesn't have automatic calls recording, and the Devs have been weirdly aggressive about deleting and banning people that ask for it.
I use GrapheneOS and have reviewed a lot of the documentation in the OS and built in apps. They like to pair the words privacy and security together in that documentation. The info sheet for the chromium degoogled browser they developed called Vanadium is very focused on both aspects. I personally think the two concepts go hand in hand.
Its also the first time I've used a non-firefox type of browser in almost a decade. It feels weird, but they are good at describing why it's more secure in GrapheneOS due to its superior ability to maintain app sandboxes, which is a big reason I use the OS. Full control over what apps can see on my device.
Maybe because... automatically recording calls is literally illegal in some places around the world? It should probably be user choice to opt in to that so it wouldn't be on by default. And then, if you have it on while travelling, you could forget and break the law when going through a jurisdiction that does not allow it. Better to explicitly allow for each call, like it does currently.