This is good advice. In testing, we call these "paths". And there are "happy paths" (where the outcome is positive), and "sad paths" (where the outcome should be an error message or similar.
One of the goals of good design is to reduce the occurance of traversing of sad paths, by nudging the user to make fewer errors, and making those sad paths less sad, by giving users a chance to continue on or correct their entry.
Finding out common paths makes for the most-efficient integration test.