StealthX and SimpleSwap are not DEXs. They are centralized exchanges who are using Binance in the background for HIVE.

Over 200 million HIVE tokens are currently held by centralized exchanges. +150 million HIVE is just on the Korean exchange Upbit. For context, total liquid HIVE right now is ~280 million.

It's about providing ease of access to non-custodial wallets and not being overly dependent on centralized entities.