So they just trick you into giving them all your good candy, then trade you for the rest of the good stuff they couldn't get their greasy little hands on for their really bad candy, making you think the whole time that you're doing the right thing. You can give me that awful Reese's Peanut Butter Cup. I don't want you to have any of that gross candy. I'll just trade you for this balloon. You can do more things with it anyway.
Balloons last a lot longer than any kind of food.
It's definitely worth more. The trade would go down and the confusion would set in. But after a few years of experience in the wonderful world of sweets, you master the force on your own. No more of those peanut butter gross things in the orange and black wax paper. After a few more bountiful hauls from Halloweens come and gone, you learn the art of separation.