Cool artwork, the sentinel needs a lot of eyes to be able to be a better guardian:)

I dont think the one who told you to write more meant that your posts are worthless. It is just that without any content a creative post does not get much comments from the community. The most someone will write is cool artwork or sth. Of course is up to you to write or not or do whatever you like but in the end Steemit is a social media platform and not a showcase platform.