You could make the same claim for salt, saturated fats or even water if you wanted to. Everything is a poison.. it just depends on the dose.
Our bodies actually need a certain amount of sugar . It's why evolution built into us the craving for sweet things .. sugar is instant energy and in the distant past that often meant the difference between life and death.
I eat a lot of sugar, but I also run 70 miles a week and swim 5 so all that energy is not only consumed but required. If you like sugar maybe the answer is to increase your excercise rather than reduce your intake.
No we don't need extra sugar. We can make our own sugar from carbs, protein, and fat.
I think sugar is the only macronutrient we don't actually need any of to survive.
Most people don't put in 1.5 to 2 hours of excersise a day, I'd be surprised if the average person does 1.5 to 2 hours a week. That is a big ask for the average person. I'd personally would rather just cut out my snacking and go to the gym 3 times a week.
True, but there's a difference between natural sugars, like from a strawberry, and the processed sugars (or worse HFCS) you find in almost every item on the market these days.
Exercise is helpful, but it's hard to keep up when you don't have time for it or the time to prepare your own meals all the time with fresh ingredients.