> This is all fun and games unless you have to debug someone elses code and they use a new feature that you didnt know about.

What’s wrong about learning things by looking at code from more experienced people?

You underestimate the social complexity of a simplified language. Everyone would disagree about the design (what is worth including because it is "simple" or necessary?), everyone would avoid using an handicapped language where features they need are gratuitously missing, and nobody would care about it enough to work on implementation and maintenance.