Hacking doesn't just refer to security vulnerabilities and unauthorized access.
"A hacker is a person skilled in information technology who uses their technical knowledge to achieve a goal or overcome an obstacle, within a computerized system by non-standard means."
"A hacker is a person skilled in information technology who uses their technical knowledge to achieve a goal or overcome an obstacle, within a computerized system by non-standard means."
https://en.wikipedia.org/wiki/Hacker