I think this is a strong feature of GrapheneOS. It's much easier for people to migrate stepwise than go completely cold turkey, which is simply not possible for most people.
E.g. I need WhatsApp, because all of our daughter's school stuff, birthday parties, etc. is arranged through WhatsApp. GrapheneOS provides good middle ways. A new user could install Play Services in the owner profile and still get much better security than stock Android (because many more mitigations) and better privacy (because sandboxed Google Play). Next, they might have a separate profile for apps that require Play Services. Finally, once these apps are not needed anymore, they could get completely rid of Play Services.
A lie to make weak people feel slightly better about their crippling smartphone dependency.
It has nothing to do with weakness. People live in a world where they have social contacts and obligations (mortgage apps, banking apps, etc.) that happen to require apps that use Google Play Services. I am happy if people try to remove as many of the dependencies as they can get away with GrapheneOS.
Don't throw away the baby with the bathwater.