As you rightly say, you have to understand the history of each of these major social interaction platforms. I love my HIVE Blockchain, I have a group of colleagues and communities that I really enjoy a lot, some of us went from being simple colleagues to being friends and treat each other like family.
I have wanted to join Blurt for a long time but I don't have the time to do it, I know there are people with very good intentions and good projects in Blurt. The same happens to me with Steem, because before being Hiver I was Steemer, but, I no longer have time to create content in Steem and it was forgotten, however and despite the separation, there were good projects and good communities making life in Steem.
There are other platforms like Noisecash, Readcash, Torum, among many others that can also be fun. But they all have their good and bad things.
What I want to say is that there will always be ill-intentioned people who want to harm or take advantage of the system, that happens on all platforms, the best thing we can do is to continue doing things well and enjoy and love what we do, that our work is our cover letter.
I like how you expose the educational way of things, but I recommend you not to spend energy in demonstrating which one is better or worse my friend.
Some people from blurt (Ex-hivers) should also not spam hive with comments "it's better on blurt".
By the way, this post was about understanding why some things are muted or downvoted. I hope I cover it well.