The whole Tether issue is only an "issue" if they are created out of thin air.
Its not a issue if central banks do this all the time.
Since nobody complains about central banks printing money out of thin air, I think its fair to not complain about a private company printing tether out of thin air.
If you complain about tether printing, but dont complain about fiat printing, then you are an accomplice of the fiat system.