Why is cooking considered an art, but baking a science?

much less tolerance in baking. you can't use 2-3/4 cups of something instead of 2-1/2. cooking in general tends to have much more slop/wiggle room.

Baking tends to be much more precise in its requirements, the chemical reactions need things to be in specific ratios.

I guess it's because in baking your measurements and ingredients have to be precise. Where as in cooking you can compromise.

Baking relies on chemical reactions among the ingredients.

Huh, you're right. I guess I'm a better scientist than an artist.