Turning a turbine by hand wouldn’t create much energy because you aren’t putting much energy *into* the system to begin with.
Using a big bonfire to boil water to turn a turbine would create a bit more energy because it’s turning the turbine more quickly. The problem is that you’d need a *gigantic* fire to get the amount of energy you need to do anything at a large scale, and you’d have to keep feeding it constantly.
Nuclear power turns the turbine *really* quickly, and uses a small fuel source that “burns” for a really really long time.
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