It's not illegal for you to do security research and Apple is not attempting to make it so. You'd like it to be more convenient to do security research and that is what this program is designed to do. I don't see why it's unreasonable for Apple to have terms you need to agree to to benefit from this program.
I think it is not unreasonable for Apple to make security research convenient without adding onerous restrictions on how it is done. Many other platforms do this already, too–actually it's the norm for most of them.
