Everything central bankers have said a CBDC will do:

Expand financial access to the unbanked.
Improve the application of monetary policy.
Increase the speed of payments.
Improve cross-border payments.
Increase competition.
Increase financial system resilience.
Enhance financial stability.
Create programmable payments.
Increase financial surveillance.
Stop sanctions evasion.
Evade sanctions.
Enhance government payments.
Enhance the digital transformation of the economy.
Strengthen the international role of currencies.
Prevent the use of cryptocurrency.
Prevent dependency on foreign payment services.
Establish universal acceptance.
Compete with private services while also not competing with all private services.
Replace cash while also complementing cash.
Create a free option for consumers while still paying businesses’ fees.
“Future-proof” the economy.
Reduce currency fragmentation.
Reduce costs for businesses and consumers.
Create a foundation for financial innovation.
Prevent discrimination against central bank money

If you believe them, I have a bridge to sell you.