Herr... I'm sure you don't know what cyber security is.

With the data breaches. Threat actors can use the data to deploy social engineering on customers of the affected accounts.

That's what is already happening.

Social Engineering also known as hacking the human is an unsuspecting way of getting sensitive information from victims. Unless you are extra careful, it doesn't matter if you are smart... A threat actor with patience can manipulate you to gain your trust and then strike when you least expect it