I agree, my kids learned nothing from their "egg" experiences, and my daughter also enjoyed buying/ making little accessories including a wig for her "baby." The girls saw it as an art/doll project, and the boys treated it like it was a joke. I think with the baby dolls you are right; they generate more attention, and there is a competition about who is the better "parent." They know it is not permanent.
However, our high school health program is wonderful, and certainly is not the abstinence-only one, which has been proven to do more harm than anything else. I think in theory the baby doll idea is a good one, even if only a few really profit from it. They should definitely get rid of the eggs !