Yes, that's true, but my ninja blender can't puree it without some water, and I have to precook it anyways.
you can boil pieces of eggplant in salted water. in that case you don't need to puree it. I ate in italy pizza with mozzarella, peppers and eggplant cubes with skin on them. I guess after draining them they put them in olive oil. that gave them heavenly taste.