[WinstonSmith84]

you compare pear and apples. CBDC is to be compared with your current saving account, whereas a debit card is how you can spend the money from that account, whether it's a saving account or a CBDC. Likely debit cards will still exist with CBDC, assuming not everyone has a smartphone.

The "advantages" of CBDC, in regard to governments, is that this is a sort of entry in a database, possibly every dollar having an "id", perfect for tracking. They will know what you bought, when, etc. Also, governments could delete that entry to remove dollar from your account. They also could simply lock that account since the CB/government issue this currency as it's not controlled anymore by your local bank. In a sense, governments already have some of these capabilities, but it's a lot of procedures to access and block the money (remember the Canadian truckers?). And at the moment, it's even harder to track the flow of money in the current system. CBDC is going to make such control much easier and faster.