Graphene user, not part of this cult you speak of. I used to be solid tinfoil hat but now I try to balance between security / privacy and convenience because it was all too exhausting.

Years ago I switched from lineage to Graphene because the Graphene experience was much smoother. Installs, updates, options, it's all just easier. Granted the last install was a pita as funny enough they required chrome for the install. Aside from that it's been so smooth that when my partner kept asking for a new phone, I had them agree on letting me install Graphene. I would have went with fairphone but I can't put something on their phone that I have yet to use. Graphene is solid, stable, and for the most part usable. There's a few minor things out doesn't do like customizations and slight compatibility issues but in relation to what it provides is an acceptable trade off for the time being.

All this to say Graphene has their place for non cult users.