Explain gear to a noob
While the armour has the same Stat values, they don’t have the same Stat combos.
For example, Soldier armour has Power, Toughness and Vitality, while Berserker’s has Power, Precision and Crit Damage.
Different stat combos will suit different builds.
Time is a river.
The door is ajar.
All exotic gear is equal in stats….. but the stats itself can differ. But in essence your right. people farm for a skin and not for the stats. The only exception is ascended gear from fractals. Beside the infusion option that is only important in high level fractions, the stats are also higher then exotic gear. Last off all, some dungeon gear comes with unique runes. These runes can also be bought with dungeon tokens separated and applied to other armorskins.
Arise, opressed of Tyria!
See the Item nomenclature in the wiki for specific attribute cominations.