I think there are two types of tutorials which exist: one which provides a high-level overview and the other which thoroughly examines a subject using a practic

I think there are two types of tutorials which exist: one which provides a high-level overview and the other which thoroughly examines a subject using a practical example. The former is usually the territory of novices who want to demonstrate what they've learned using technologies they've recently encountered. The latter is quality content written by professionals who truly understand and are passionate about the subject they're discussing. Both types of resources serve a function, but when a certain field has a low expert-to-novice ratio then it is understandable why it might be more difficult to find one instead of the other.