"That's the beauty of the blockchain. Nobody can be banned."

No, there is no beauty in that! In fact, the fact that nobody can be banned is one of the biggest flaws with the Steemit platform. Without the ability to ban abusers, Steemit is turning into a cesspool of undesirable activities, not the least of which is all the porn that the system is attracting, all of which is a huge deterrent against finding new members, at least those with reputable standards.

"Your bank can flag you and freeze your account (real cash-money-dollars) at any time and for any reason, they don't have to explain it to you and they don't even have to charge you with a crime."

That is simply NOT true! There are many safeguards in place to prevent that from ever happening, at least with any kind of a reputable bank.

"Pa.ypal can also kick you off their platform (permanently, they have your ID) and freeze your funds for 6 months and nobody can even ask why."

I fully support PayPal and what it does...it is by far the most widely used and without exception, THE safest payment gateway on the planet, bar none.