The full GTA V source code has been leaked The leak contains GTA V source code and stuff from Bully 2 and GTA VI Leaked in a discord server by a random British guy in the 360 modding community known to get sued by Rockstar multiple times
"Now i am expecting a open source version of gta to arrive soon on linux natively . Tired of playing supertuxcart."
Here is the source. Another one.
I think you're vastly underestimating what a big stack of green can do for the morals of an 18 yo.
An 18 yo isn't gonna get fat stacks of green as a pentester.
The suits that decide salaries have different priorities. Like certs that are out of the price range of a teenager and years of professional experience.