But an airplane operates because it obeys the laws of physics. A non-"onerous" DRM requires a violation of physics (specifically entropy). The inclusion of DRM increases information costs, which can be paid in money, time (either yours or the processors, or restricted usage. Those are your only options, wishful thinking aside...
I don't think you understand at all what I said.
I didn't make any snide comments to anyone about wishful thinking.
I said we haven't invented a painless way to do it, but we eventually will. We just don't know what is it yet or how it will be done.