The idea that Tether just prints out of thin air is a conspiracy theory, I've seen large traders confirm they can do create/redeems and there was some information released about their holdings of commercial paper, settlement with NYAG, etc. And they have frozen stolen funds in the past, in the case of the Poly network hack. USDT routinely trades at a premium to USD, the market does not seem worried.
Of course Binance and Tether and a lot of other unregulated crypto companies are shady, but it's more interesting to focus on the particular shady company in the original post.