how about other Stablecoin, tether are audited by regulator and managed by big company, i don't think you're argue is valid
For analysis of other stablecoins, you can see the information from @mk4's thread here:
Most Stablecoins Can Be Frozen, Even When in Your Own Wallets. I think @mk4's thread described them very clearly and he also explained it with proofs. Anyway, OP has stated that he didn't try to blame Tether developers but he just worried that Tether can be manipulated by Central bank mafia. Please, read again on OP above!!