Not everyone is just trying to trade and ride waves for profit, a lot of people are just putting their life savings in crypto and holding. They should understand the tether risk before doing so.
The Curve "3crv" pool (which allows large volume low slippage conversion between USDT, USDC, and DAI) has been at >50% USDT for a long time, going up to as high as 80% when people are truly spooked: https://curve.fi/3pool