My point is that the current financial system is not secure in any sense. Why would i have to give you my entire credit card information to make a payment. Why are you 'pulling' money from my account instead of me sending it to you. Why have we failed to implement a public/private key relationship with our financial data?

>giving the info to centralised entity like a bank is bad?

Well my first and prime example would be to talk to any greek citizen during 2008. The goverment took a percent of all the citizens money to pay their debts. Countless credit card scams have happened because i am trusting all of my data on the cybersecurity of (Upwork, linkedin, outlook, google, tinder, etc. etc.) as you go down the list of entities with your full name, address, & credit card information you start to realize that you have lost control of your financial self-sovernty.

I've played this game with my friends and it's a fun one; Give me your full name and i can buy your information on the darknet, including current/ past credit card info, Social Security number, past addresses, past-employers, tax information, etc.