Because tides are caused by water being squeezed to the point under the moon (or on the other side of the Earth as the moon) not by the moon pulling up on the water.
Basically all the water all over the earth is being given a slight tug by the moon’s gravity, and the net effects of all these slight tugs, across the huge surface of the earth, is a movement up or down by a few feet.
Other objects would need to be planet sized, and fluid like water, to experience the same type of thing.
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