It's like temporary solution only for those people who would like to use an exchange but they can't afford to trust to hand their KYC to any platform whether its trusted or not.
If I just need to buy an asset and put it in my wallet, then I will probably use DEX (if we are talking about a liquid coin). If I want to get into trading, then I definitely will not use DEX for this purpose, as it is a parody of trading. For this, I will choose a centralized exchange without KYC.