I am confused in the overabundance of it.
The majority of these posts are directed towards print and play games. There are thousands of them available on BGG and a lot of them are really top notch games. For most PnP games, all the components are available free to download, so all you have to do is pick some that interest you, print out the components, and you have a brand new board game.
But when you come across a really good PnP game that you want to keep around or show to others, that's when you start looking into making a high-quality version of the game. The ultimate goal is usually to make that free game by an independent designer look just as good as a professional store bought game.