I'm not sure where the challenge exists, unless you're talking about automating the whole process so that nobody has to do any of the work of vetting and moderation. In that case no, it's not there, but a Nostr experience curated with intention is undoubtedly there. I use it everyday & I've been spending a lot of my spare time over the last 6 months showing community leaders how to create these spaces. In ~30 different social clients, it only takes a moment to open any relay as a feed & browse its contents (and even look at its policies in some of those). Everyone has a relay list on their profile, relay links in notes are clickable in lots of clients, and relay lists are even shareable some places. Discovering & choosing isn't challenging, if a person can devote 20-30 minutes to finding desirable sources... maybe twice to double check at different times of the day, just to be safe. And I'm not frustrated, I would like to see ZapCooking hit 1k happy, repeat users before the next spring. I just dont think trying to compete with Tiktok and the like is a winning strategy. That's all... I'll shut up about it now. 😅