Disagree. Everyone already knows about the Tether scam, so the risk is priced in. Nobody will really lose confidence as everyone expects it to blow up for a decade now. Secondly, people will just switch to USDC.
I don't think 0.9993 counts as "priced in" when the consequences of holding significant USDT during another marketwide panic might be total loss of funds:
I think every single large bubble (2008 notably) has used the argument that "since the possibility of this being a fraud been discussed, that possibility is being priced-in by the markets" and yet still the bubbles collapse.
https://pro.coinbase.com/trade/USDT-USDC