[adamisom]

The expert you're learning from probably has a better idea than you do of what programs you should write given (a) your presumed knowledge level and (b) what programs would help you learn the fastest and/or the most relevant features. Including good exercises is an extension of the purpose of the book itself.

[yesenadam]

Maybe, but they know nothing about (a) why you're reading the book, (b) what you know/don't know already, (c) your learning style, (d) your speed of learning etc.