Kind of like how having a bank account allows you to receive wire transfers from anyone? Anything will sound simple if you leave out most of the hard parts like meeting legal requirements, fraud protection, etc. (better hope the reason USDC is cagey about their assets isn’t because they’re hiding something)

It’s true that US banks are slower at transfers but most people don’t hit that often enough to balance out the extra cost and risk, and if they started losing significant amounts of business it’s a lot easier to improve there than it is to duct-tape performance, privacy, or fraud protection onto a blockchain.