I'm looking at it from a marketing, brand and growth perspective. The dominant value exchange with Steem is the ability to make money. There may be outliers but those people are actually shooting themselves in the foot by using Steem unless rewards is indeed a part of their motivation.
If someone is solely looking to create the best content they can then they shouldn't be on Steemit. They should be using a superior platform that allows greater freedom than markdown. Steemit is not the best or easiest platform for content creation. You can't even go back and edit your content after a certain point.
If someone is seeking to get a message out then they should be using more popular platforms with integrated sharing and analytics tools. The reach of Steem is far below existing social networks and forums.
I will cede there is a strong secondary niche to Steem's content platform and that is battling censorship. Pizzagate shows that Steem will more than happily store anything no matter how absurd in a decentralized fashion resistant to censorship. I wonder how long that will last if child pornography started showing up though. There are already DMCA takedown functions in the Steem code so we'll see where that ends up in due time.
The blockchain is immutable, but like any council, the witnesses can still remove content like CP if it does appears on Steemit.
There seems to be a contradiction in something that is immutable and yet can still have content removed. If the witnesses can remove it then they can change the blockchain and it's not immutable. If the witnesses can't actually change the blockchain then they can never truly remove anything they can only try and hide it.
There is new technology coming to the blockchain that does away with immutability and does allow block changes. IBM is looking at it I believe?? That is very scary!!
How do you consider it to be true?
Can the blockchain be changed or not? This isn't some sort of quantum super state.
"Can you remove content from the blockchain?"
Without complete knowledge of the inner workings I will hazard saying yes from what I understand. I believe that a consensus of the top 20 witnesses could push through an altered blockchain but I could be wrong.
Let's assume they can for argument's sake. That would mean that the blockchain isn't immutable since it can be changed in that scenario. This relies on the blockchain being defined as the current live consensus version.