I tend to think some of the people are too technical for their own good.
While it is entirely true what is written on the blockchain is on the blockchain, that doesn't mean it needs to part of the steemit experience. We can see this with the NSFW hashtag. I can post anything I like and add that single hashtag... Because the site filters it out, it's not visible to anyone here.
Same with the mute button. It keeps you from seeing what was said, even though it in no way removes it from the blockchain.

There's a middle ground that can be explored.