And what would the "correct" angle be?
I want a similar thing for GrapheneOS. I think the current project and website is not just fine, it's more than enough the way it is. Where it needs more energy is reaching users via b2b agreements - like having phone manufacturer support for GrapheneOS, and even better, Graphene preinstall offerings, preferably in a wide price level. Murena, for example, is one that's on the right track with their similar thing. I want this for GrapheneOS as well.
I guess the TL;DR is: they don't need to target the end user better, they need to find businesses as partners.
I would say it's still a bit more of a slower growth approach, but that can be fine. To be clear, I don't really have a dog in the fight, I was just questioning if faster growth is what Graphene wants versus an approach like you're describing. Both can be viable for growing, but even with your linux/Steam example, it's not like linux has taken the world by storm - it's still at ~4% "market share" (and that's even among Steam users). It's still very niche, really only used by gamers and coders.
But I think we're talking past each other, or at least with different assumed goals. My suggestion of showing features and having a more broadly appealing website assumes GrapheneOS wants to some day be on 30%+ of phones in the US (potentially supplanting Android). And I just don't see how you get there with the website as it currently is.