Almost all exchange tokens are just a way for exchanges to make more profit. They try to promote a token by giving it's users discounts for holding it while they actually hold the majority of tokens in their own wallets. After the token has gotten some traction they can start pumping it more and slowly selling their own bags while the users are buying them all because they get a small discount on fees. Inherently the tokens have no use so IMO there is no reason for them to exist except to make money for the exchange owners.
I like your candid opinion, in as much as its true exchanges principally create token for profit maximization, some exchange tokens have proven great in many ramifications. For instance, KCS can be used to play games on PLAYGAME platform. Others like BNB too have more uses aside the trading fee, listing fee, IEO uses.