What many people don't realize is that the operational and customer service costs of payments don't scale with payment amount. Customers will cost almost just as frequently dispute, have questions, have problems, ask for help, attempt to defraud etc with a $1 transaction as they will a $100 or $1000 transaction. This is the real killer with micro payment schemes. Customer service costs scale more with number of payme…
I don't know which "crypto bros" you've been talking to, but as someone who is building a self-hosted payment gateway for crypto [0], the benefits from using crypto are two-fold: it eliminates the chance of fraud and it moves the cost of customer support to the merchant.
Also, once again I will have to repeat that no one sane will try to completely replace the existing payment systems with crypto. Crypto is meant to be an alternative for the cases where the cost of existing processors make the transaction not viable.
[0]: https://hub20.io/