Nothing wrong with posting simple content, never said there was. But your friends most likely left (based on your comment about curators) as they felt they didn’t receive the reward they deserved, that’s the issue. We have set unrealistic expectations and now this is the norm.
If I post simple content, I expect simple rewards. If someone posts a professional level video that can be used by the Steem community for educational or marketing for years to come, that reward should be higher imo.
Simple content is normal for a social platform, but Steem is more than just a social platform and content is not the only aspect.
What adds value is different to different people, but the reward pool is set up to reward contributions to the ecosystem. If we are not using it on the things that add long term value, we are wasting it.
As I said in a comment above, I think Steem should be for all content and it should be rewarded accordingly. I’m hoping communities help this as well as encourage engagement, as I honestly think the engagement that this community brings is extremely valuable.
RE: Reward the behavior you want to see - It’s really that simple