It is impressive because its hard. Only 4 countries have done it, most nations have not even tried. It is a fair bit harder to land on the pole of the moon, no nation has done that at all.
It is impressive because the south pole is thought to be an optimal spot for future human landing & settlement. Some deep craters are always in shade, so may have water ice. Some crater lips are (almost) always in the sun, so it is great for solar energy. Plus having a constant areas in the sun and in the shade is good for heat management – too much heat in the sun, too little in the shade.
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