You and I find this to be true because our sense of privacy/security aligns with that community’s.
Techlore has its problems, but grift isn’t one of them (may happen in search of virality or marketing or whatever, but I haven’t seen it happen, yet; or, may be, I’m not paying attention).
As for “less secure”, it goes without saying that everything is less secure given a rigid enough threat model.
Calyx actively collaborates with multiple FOSS projects (like F-Droid & Lineage) in the Android space, no? They once had a neat thing going on with Graphene, too (viz “AOSP Alliance”). It all came down due a spiralling set of events.
Graphene and PG are very different communities (with their own set of problems). Not surprising one finds trouble with both, as nothing is perfect and god knows everyone’s list of grievances & grudges runs unto infinity. Digital Privacy is a charged topic with a lot of passionate folks around.