> This is laughably false. The highly-paid, experienced seniors produce so much more value than juniors that it's not even in the same ballpark. It's also usually the kind of value that juniors don't even notice, because it's not measured in lines of code.

This particular case sounds like someone got incorrectly hired as a junior. Maybe they didn't have enough "real world" corporate experience and that is why they weren't offered a senior position?