Trying? They definitely need to do better than trying, we are talking about people's funds here and without that audit, how can customers know if the Tether in their wallet is backed by USD or backed by thin air. The community has been sceptical about Tether for a long time now and that is why it is advisable not to hodl it for too long, this is without adding that they can freeze your usdt, even if you have it in your non-custodial wallet.