At the current time, I can clearly say that centralised platforms have some problem due to their nature of rules ( as you say), and tracking. So every person, writing comment, can be tracked. One of my friends wrote something about one of our politician years back when there was a riot on the street. And few days after, he got police on his doorsteps. So much about freedom of speech.

Problem for our freedom as a society is the "corporatization" of social media and big government influencing the modern model of the World Wide Web and social media.

Just like @anomadsoul says...
Facebook sells your personal information. You are a piece of data ready to be sold to the highest bidder in order to be able to sell you random products or services. Youtube is falling apart as creators are searching for any and every way to get OFF the platform and find a way to make money elsewhere. Tumblr banned their primary user base and demographic content consumers. Flickr is - out of the blue - charging their userbase a yearly fee for something that used to be completely free. Patreon is censoring and demonetizing the users who don´t align with their political agenda. Paypal is deciding who can and who can't transfer money for arbitrary reasons. Twitter is a cess pool of a left wing echo chamber. If you don´t agree with someone or if you have unpopular opinion, you will get reported by groups of SJW´s who will get you banned. It is all just crumbling down before our eyes.

But Steem has all that functionality. And more.... Without political agenda, without demonetizing users, without demographic content consumers, with no rules to agree to someone just to stay on the platform....Steem just has different names for all the functions ( dtube, steepshot, steempeak, partiko, musing, fundition, tasteem, d-oracle, steempress-io, actifit....)