Hi, as a senior citizen and also a relative newbie here I agree wholeheartedly with what you say.
I've so far posted just a small number of articles all of which comprise my own content and images. I take care and trouble to ensure that what I post is as good and interesting as I can manage. I'm not as tech savvy as many youngsters but do consider that if I can produce a quality post then most of them should be able to do at least as well.
I think that a high percentage of what is posted could be of a higher quality and find it irritating to find so many empty articles, cut and pastes or single pictures posted with no explanation.
On the plus side Steemit is still a young system and will I hope mature and become a byword for quality as it grows and develops.