Paul Revere was a Freemason so it makes a better story in the context of history and for bashing American secret societies that created the new world.
I don't know about Paul Revere, but many of the big name masons then, (and now), were only token members, invited in so their notoriety could lend credence to the secret society. But one of the most little known historical facts is that the bad actions of freemasons in America is what actually caused the very first third party, (in 1823); it was known as the "anti-Mason party".