I agree with you and it does seem that most people prefer ERC20 USDT. Have a look at the DeFi launching projects and you will see that for all of these tokens you need ERC20 USDT. Most DeFi token sales go through an ERC20 system - coincidence? I think not.
It is possible that this trend burst at the same time as DeFi came about, that is a possibility indeed and can easily be traced back - but I'm not going to do that here, I'll only present the possibly
