Because, it's not available in my nation to buy any amount you want, and sell any amount you want. There are regulations and people who do not have a license to trade, could do so with a limited amount of money, well I am already under that limit, so it wouldn't have mattered to me to be fair, but many people prefer USDT in my nation because of this, many also moved from USDT to BUSD instead, because Binance is bigger and better.

Long story short, USDT is still better because it's still crypto, we could also go into crypto from there easier as well. I have to say, the regulations mean nothing when you are in crypto and you know what you are doing.