CBDC come to life as a response of central banks to the success and growth of the ordinary crypto-market.
Whatever private current payment methods are available VISA/MC/AmEx, paypal, alibaba, wechat pay … etc. , are going to be nationalized, or marginalized, or eliminated and then centralized through CBDCs.
The resulting value transfer system can be used to the benefit of people, or to force obedience of people.