There’s an issue with how some people define the word “hacker.” For some, it’s a word synonymous with “cybercriminal,” but not in the infosec community.
White hat hackers (the good guys) are the ones who find security issues so they can be fixed. The world is a lot better off because of them.
Every day we interact with web applications and services built using programming languages. Hackers, both the white and black hat, comb through millions of lines of source code.