Fruits are healthy because they have a lot of fiber that slows down the absorption rates of sugars contained in them, which means they don't spike insulin levels like processed foods which contain table sugar or refined sugar. High insulin level are associated with obesity and other problems
Here is my entry in the sugar free challenge: https://steemit.com/sugarchallenge/@calatorulmiop/quitting-sweets-and-what-i-eat-during-a-normal-day  
Keep up the sugar free lifestyle :)