[arcticbull]

"Of course, I do not expect USDT imploding anytime soon, so don't do this" doesn't suggest anything about counterparty risk with USDC.

[bouncycastle]

USDC is an example, it's not necessary that you use USDC, there are a few other currencies that can be used for collateral and swapped in to while you wait. Let's be clear: "Do not do this" means do not do this in whatever variation.