What they are saying is that there is no requirement to strike the cue ball so that:as the base of that object ball clearly is in the kitchen which makes it ineligible, unless you went across the line hit something else, ball, rail, something, and then hit that ball.
1) the cue ball crosses the head string
AND
2) The cue ball hits something on the other side of the head string before striking an object ball in the kitchen
They are saying that the rule is merely:
1) the cue ball crosses the head string before striking an object ball in the kitchen