If you already use crypto, it can be convenient.
I already use crypto, so the option to fund my account with USDT was useful. I wasn't interested in crypto because it sounded modern or anything like that. I just didn't want to deal with a slow international bank transfer every time I needed to move funds. Since I was already comfortable with wallets and networks, using USDT wasn't a big learning curve for me. I could use something I was already familiar with instead of setting up another international payment route.
That's probably where this feature makes the most sense. If you already use crypto, it can be convenient.