I couldn't agree more with your points.
In my case what I enjoy the most is to learn new things about the subject that I'm writing about.
Writing has to be enjoyable. Not a chore necessary to get some rewards.
From a resource point of view a challenge is to find images that illustrate the science but with suitable copyright. A good image can really help explaining the topic of the post.
This holds especially true for this platform. The amount of people who just post random shit is unbelievable.
Just ignore the noise.
I usually stick to my feeds and check other steemians that post interesting comments.