I've heard that the Steem blockchain cannot remove content like Facebook does. However, I've also heard that the Steemit app, the Steemit.com website, the American Steemit Inc company, may remove content off Steemit.com (not Steem.io) if the government commands them to, like because of copyrights, child porn, Hillary Clinton's secret emails which were sold to China and other countries, or whatever. So, if Steemit were to maybe remove some of your content off Steemit.com, then you may still see the content still from Busy.org or other apps of Steem, maybe. This is only what I've heard and I want to believe that this is basically how things are for better or for worse. To some extent, therefore, based off all of this, I'm thinking Steem is a lot better than Facebook and the big three in general as you were saying. 
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# Bad Government
If American government became very bad (I mean, even worse than what the swamp already is) or something, and if they tried to force the USA Steemit Inc to remove Alex Jones content, as many newspapers are being forbidden to source Info Wars right now, then that could be a problem. The code for the Steem blockchain is probably good to let people add content that can't be removed after 7 days, theoretically it would seem. But I am worried that Chinese government, the NWO, or whatever, could try to force Steemit Inc or whoever to maybe change the Steem blockchain code, if that is even possible, to find a back door to allow for taking down content, or whatever. But for the most part, Steem and Gab and Minds and Bitchute and Real Video and others are the tip of the spear, so far so good, and better than the anti-social networks, the tech giants. Wishing the best for the new big tech.