I agree that traditional/pure/naive/act utilitarians are not going to believe in any special obligations to parents—the same way they don’t believe in special obligations to be honest, or keep promises, or be a good friend. If you object to special obligations to parents because they are ‘forc[ing] an unformed, non-consenting minor to sign a binding, life long conflict’, you should be much more averse to traditional utilitarianism, which is one of the most totalising moral philosophies. On the other hand, if you want to make modifications to utilitarianism, special treatment for family seems pretty plausible.
I agree that traditional/pure/naive/act utilitarians are not going to believe in any special obligations to parents—the same way they don’t believe in special obligations to be honest, or keep promises, or be a good friend. If you object to special obligations to parents because they are ‘forc[ing] an unformed, non-consenting minor to sign a binding, life long conflict’, you should be much more averse to traditional utilitarianism, which is one of the most totalising moral philosophies. On the other hand, if you want to make modifications to utilitarianism, special treatment for family seems pretty plausible.