People have been printing blogs for hundreds of years. See "Common Sense".

https://en.wikipedia.org/wiki/Common_Sense

Getting a blog such as "Common Sense" printed in those days was much harder then getting a firearm.

I'm not so sure about that. Firearms in those days were custom made by hand one by one by specialized and highly skilled (i.e. expensive) craftsmen. A firearm was a prized possession, and often a work of art.

A pamphlet might be typeset in an hour by the unskilled printer's apprentice.

Not in 18th century. You could get a gun then for about month's wage of a skilled worker. Not exactly cheap, and significantly more expensive than now, but not exactly impossible to have even for a skilled worker or a middle-class person. And there are now firearms in that price range, though many common ones are significantly cheaper. Something like a cheap car - not pocket change, and you won't get one unless you need one, and if you aren't rich you probably won't get more than one - but for most people, not out of reach entirely.