It's mainly built for users in LatAm, where the easiest way to escape their currencies and transact is in USDT (usually over Tron). https://twitter.com/FootprintShow/status/1742878757361455391?t=uq86zIvu-YgIriGe0R2WwA
This is an important point. And it's hard to weigh trade-offs where some things are a slippery slope but other things are worth the risks. I have never been completely comfortable with blockstreams relationship with tether but I also see that there are real world reasons why it is useful like the one just described.