Because the attractive force is so small. The net force of the electric field plus gravity is likely very similar to just gravity.
You may have rubbed a balloon on your hair, generating a static charge. You feel no attractive force toward the balloon, but your hair is pulled toward it, and your nerves can detect the changed angles of the hair.
You may have rubbed a balloon on your hair, generating a static charge. You feel no attractive force toward the balloon, but your hair is pulled toward it, and your nerves can detect the changed angles of the hair.