I think the main issue is that making a game is a much larger project than what a beginner of RPG Maker might think. There are many more components to it than is first realized, and if you want any type of originality, the default resources just aren't enough. On another note, most people tend to gravitate towards only a few aspects of the project. I myself am obviously scripting and I did enjoy mapping, but my skill for making graphics, music, and especially storyline are very limited, so I don't even attempt them. There are tons of great resources to be found, but my point is that all in all, making a game is very difficult to by oneself. It is most easily achieved with a team, where each member has their own skillset, and it is an equally enjoyable experience for everyone. Herein is another issue, assembling a team where every member has the time and commitment to invest in the project. On an amateur level, this is difficult. Since we are all mostly just doing this as a hobby, finding a team where each is equally invested is quite hard.