Question

If you take a bite of a plant why does it not taste sweet all the time with sugar made?

Answer 1

because sugar is not a long lasting condiment

Answer 2

Because the sugar that is produced in the plant is not the sugar that we consume it's simple sugars called Glucose. Like, if corn syrup is syrup why doesn't it taste sweet? Because it's meant to be cooked with. Plants need those sugars to survive.