That the price is low is not questioned. The hiding of cost is. Is this not clear enough, There have been so many discussions on it.
How can you hide a cost when the purchaser has to approve the charge before the flight is booked ?
Legacy carrier made use of the change in the rules where service charges could be shown separately to gain a fare price increase so idea that the underhand charging started with LC's is a figment.
Then again the reluctance of airline to remove their fuel surcharges when oil prices have collapsed gets skated over.