Why is nuclear fusion more efficient than chemical energy sources like burning wood?

It involves the rearrangement of nucleons within the atomic nucleus

Chemical energy sources, such as burning wood or fossil fuels, rely on the rearrangement of chemical bonds between molecules, which is a process that releases relatively low amounts of energy. In contrast, nuclear fusion derives its power from the rearrangement of nucleons, which include protons and neutrons, inside the atomic nucleus. This process changes the fundamental nature of the matter involved and releases energy through the mass-to-energy conversion described by mass-energy equivalence. Because nuclear forces are significantly stronger than chemical bonds, fusion can provide massive power for billions of years, a duration chemical reactions simply cannot match.