Besides being a global payment system that allows people to send micropayments across the world without having to disclose any financial data publicly, while fighting surveillance capitalism in the process, what have the Romans done for us?

The "hassle" of doing KYC at one of the exchanges and verifying your identity is only once. The benefit of being able to receive little cash for privacy-preserving ads and use it to contribute to a healthier digital economy can last for a long time.