Look. Graphene OS does security very well. But it is supporting only Pixel phones. Other OS's like lineage are maby really barebone and have the goal to help every smartphoneuser to extend its lifetime.
The war you are fighting against ROM's is no help to the privacy space. You need to accept, that different solutions tackle different problems. With all its downs and ups. You paint all in black and white. And through this you always missrepresent reality very badly.