OK, but your ultimate choice (as a consumer) is to select the airline that you fly with. If you feel you get better value for money through the likes of EVA Air, there is nothing that will prevent you from flying with them instead (apart from their route network )

An example - should all 2 litre, 4 door, cars be the same price "because all the other ones are"?

People will pay the amount of money they feel is justified. Some will justify the VS PE amount, others will not.