One of the problems we have here is self-selection bias towards being excited about steemit itself and crypto in general. One of the reasons posts about the platform itself are so abundant and remain a viable strategy for attracting attention is the fact that they appeal to the largest percentage of the users here who are here because they have a positive attitude towards the platform or they wouldn't be here.
As you pointed out, new users find it inspiring and motivating in the short run and whales find it positive. In a sense, this is the least objectional type of post one could make and the one with the broadest appeal so those posts are still successful. In a sense, that's the least common denominator here and that's usually something that rarely of high quality and still tends to work. You can clearly see it happing in music as well.
I personally remember that when I started two months ago, this was one of the first types of content I interacted with, because most of the things I saw was about crypto that I was not so interested in and steemit itself which I was obviously interested and intriguied by which is the reason I registered.
I think steemit is still suffering from lacking well developed niches besides the meta conversation about the platform and crypto and this is a sign of a new platform and is something that we need to overcome.
Still, writing about steemit from time to time is fine if the posts are meaningful and honest, not just votebate, but we do need to make an effort to expand the niches that would bring people beyond the early-adopter phase. It's often what makes or breaks a platform really and HF19 might not have been a step in the right direction and I have my worries about HF20 as well.
We might be nearing The Chasm and that's going to be the make or break moment for steem as a whole.