The printing press is heavily moderated.
Can I steal other's content and sell it, no, but I would call existing regulations almost non-existent for original content.
Publishers. There are documented cases of writers and genres being blacklisted and suppressed. (Though in fairness, you might find more than a few of them unsavory.)
I can buy a high end typesetting laser printer and print anything I want on it- if it isn't child porn/top secret/libelous I can print anything I want that I've originated.
Sure, but good luck with the promotion and distribution.
It may be 'moderated' in the sense of an optical cable vs a copper one- by its nature there is impedance in the copper one limiting its potential carrying capacity. In that sense the internet vs traditional publishing have a different ability to scale. But Hitler's rise didn't need the internet- Mein Kampf found fertile soil due to economic depression and already extant racist attitudes latent in the populace.
China finds ideas contained in books by Locke/Milton/Paine or the Magna Carta to be extremely dangerous- and that they are and I'm sure they're be ingested wholesale in Hong Kong right now, where the Great Firewall isn't in full effect.
We need to counter evil thought with the only available agent that will actually work- better argued thought that seizes on vigorous ideas that instill a deep abiding respect for their fellow men/women and the potential of civil society to overcome the divisions we've placed among ourselves.
You could spread your message further by printing lots of posters and putting them up in your city, but it would obviously not be comparable in reach to the Internet. Newspapers that do have reach comparable to the Internet all choose to exercise their legal right to decide for themselves what is too hateful to spread. Cloudflare has now chosen to exercise that same right, to a tiny extent.