I don't really understand what point you're making here. Gasoline doesn't release energy on its own either, and the average person doesn't have an ignition coil or pistons in their stomach. This person obviously wanted to know how long a human being could be "powered" by a variety of energy sources. It's a silly, abstract question - details don't matter, only the energy that we can theoretically extract from the material does (in the way energy is usually extracted from the material; gasoline: ignition, U-238: fission). The number it put out, 200 MeV, is a very close approximation of the net energy you'd gain from a neutron induced fission reaction of U-238.
Honestly, it feels like ChatGPT understood the point of the question better than you did. And if it answered in your nitpicky style, then we'd probably be criticizing that.
Honestly, it feels like ChatGPT understood the point of the question better than you did. And if it answered in your nitpicky style, then we'd probably be criticizing that.