Skinny tires: "Here comes a tree root, I need to adjust the angle to cross it at near 90 degrees or the tire might slip!"

Fat tire: "Here comes tree roots from every direction with rocks the size of grapefruits! CHOO CHOO <explicative deleted>!!!"

"But fat tire bikes are only for snow and sand!! Stop having fun on the trails!!!"

Tell the haters that their bikes do more damage to the trails than you do....