I think it makes even less sense in ethereum, where fees are even higher.. but that is the way it is ...
Fees on ethereum is actually now lower than for sending stable coins using Tron network, believe it or not.
Not that I use any of that, but ethereum have so many second layer solutions with even lower fees (Polygon, Optimism, Arbitrum, X-Dai), and they all support Tether.
According to gasfeesnow Polygon has the lowest transfer fee of 0.001 USD:
https://gasfeesnow.com/