[Spooky23]

You nailed it.

Those organizational practices and strategy make the best developers better.

If you hire shitty/unqualified developers who cannot communicate, don't know the tools and aren't functional, even the most amazing developer is kneecapped from a productivity point of view because she must be accountable for everything, forever -- the idiots drag her down.

It's like anything else -- if you work at McDonald's, a bunch of slow unmotivated workers will slow down a fast/hard worker. It's just that the value of the labor + output for cheeseburgers is much lower than software!