You were on the right track until you reached this one, but gotta stop you here.
It’s not the equivalent to it; those who think so are only making assumptions. A game can include an item that gives stats via their CS, and then never implement one again until a year or more down the line. Once the games income starts to decline towards unprofitable levels, THEN you can surely expect something ‘p2w’-ish to appear to keep income stable before it drops to the point where the game is better off scrapped and a new one is developed to take its place.
This game just started, so there’s no basis to assume the cash shop will constantly be given power-advantages just because one exists from the start, which was ported over from the Korean version and has been in their CS for 2 months now-- and still no implementation of another item similar to it.
So people who support the game with something they feel is worth their money, and sell them to other players for profit in-game to upgrade their character, are ‘idiots’? If you’re calling them idiots for supporting something that you think shouldn’t be in the CS in the first place, then shouldn’t you call the people buying them in-game from the Auction House idiots too since they’re giving the CS buyers the reason to purchase them?
A small sign. Not one worth seriously complaining or leaving the game over.

It’s better if you don’t answer to this one. 

and get free hair dye from achievements