This can be said of newbies not in the forum, but every newbie in the forum, they might not be interested in the things of bitcoin, but in as much as they are in the forum, they will be subconsciously be learning about bitcoin. The threads we read everyday, teach about bitcoin, so anyone who has been around here for a while will have some basic knowledge of bitcoin. Unless it's someone who blatantly refuses to learn.
What Op taught about is basic, but sometimes confusing for people who are not attentive. The wallet is just an interface that enables us to interact with the Blockchain in managing our bitcoin.
Knowing about Bitcoin is essential to have healthy interactions is essential. Bitcoin is an asset worth having, so I expect most members to be knowledgeable about the basics of Bitcoin.
However, people come into the forum for several reasons. Some come here because of trading, gambling, politics, and economics. They might not be interested in learning about Bitcoin since they have other interests. If you go to the collectibles section and follow some art competitions, it will be obvious that people are here for different reasons.
But just as you said, as they read threads about Bitcoin and receive prize money or payments with it, they gain knowledge.