Sounds like a form of (job?) security-through-obscurity, no? The data was always there, but not all managers were savvy enough to process it and weaponize it.

In the end, obscurity is just not a durable defense. Better to earn trust with good managers, and avoid companies that let bad managers flourish. If you don't have the ability to quit a bad manager or bad working environment, then no amount of tooling choices by GitHub/Microsoft was going to save you anyways.