I don't know. If it were possible to travel at the speed of light across our own Milkey Way galaxy, it would take over 150,000 years just to go from one end to the other. Travelling at the speed of a NASA space shuttle would take over 300 million years to make the same trip.
A galaxy is an enormous place!
Say a galaxy contains 100 billion stars. Of those 100 billion, only 1 billion have planets orbiting them. And of those 1 billion stars with planets, lets say about 1 million have planets with atmospheres. And now let's assume 999,000 of those planets have toxic atmospheres unable to support any sort of life.
So that leaves us with 1,000 planets (and the occasional moon) that have life/ been terraformed to support life. And let's say that each planet has, on average, 10 billion inhabitants.
You're looking at a galactic population of around 10,000,000,000,000. That's ten TRILLION!
How many Jedi are there? Even if there were MILLIONS of Jedi running around the galaxy, the chances of actually SEEING one in your lifetime would be practically zero.
Now, my numbers are all pretty conservative. It's safe to assume that many of the larger planets could easily have 40 or 50 billion living on them.
In my opinion, the prequels give the impression that everybody knows about the Jedi and the Force simply because the movies focus almost entirely on characters directly and indirectly involved with the Jedi. I would imagine someone like Han Solo would have spend his entire life as a cargo smuggler in the "backwater" parts of the galaxy FAR from the more "active" places. To him, the Clone Wars would have been little more than a brief mention on the evening news, so to speak. So even though both Obi-wan and Han Solo would have spend a lot of time travelling the galaxy, they would have had radically different experiences doing so.
(There are people who are clueless about the sorts of conflicts happening in places like Africa and the Middle East. And they live on the SAME planet!)