This episode is a great way on telling people how grateful their current lives are. You see, Max and PJ were bored at their peaceful home with nothing to do, until they decided to go the the city after mistakenly hearing Pete telling them to go there. The boys went there, but soon found out that the city was worse than their current lifestyle, with pollution and callous people. They even met tramps in the streets, and this is when they decided that what life was for them was actually considered a blessed life.
Of course, with the boys going to town on their own, their fathers won't let them go there on their own. This is because they knew how dangerous life was there, and went after them with care and love.
If you're looking for an episode to tell you how great your life was (being able to watch it for sure), then watch it! It's a classic moral-telling story.