I couldn't agree more. I think the first step might be to get something that augments Substack, and others, rather than replaces.

Ie existing creators can share their existing content creation workflow here on Nostr

They can have a play around, start to experience it etc

But then again, the flip side, which I am just thinking through: focus on building tools for people that already got kicked off legacy media platforms. 

They have a far bigger problem to solve and therefore NEED

Always a few ways to peel the onion