the article claims that the sun is super inaccessible compared to escape velocity, but they are extremely closely related. as an orbit gets more and more ellipitcal, the delta-v required to get the orbit to cut through the sun drops (for a well timed burn at aphelion), in the limit of escape velocity this delta-v vanishes to zero... the implication is that they are comparable in cost, if you were to use such a method to drop something into the sun.