system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 why do we have dominate hands?

Or dominant sides in general.
gpt
Your brain is constantly telling how your limbs should move. Because it takes a lot of energy to do the maths for your hands and feet, it gives more detailed instructions to one side than the other side.

If both sides were equally good at movement, you'd need to eat more to power the calculations.