Output and effectiveness towards market needs has to matter or eventually the system collapses under its own weight. Churn has to happen, or ‘deadwood’ builds up through inertia.
And when the system collapses, it’s like a forest fire with a massive amount of dead wood - it burns everything to the ground, not to grow again for a generation. As compared to periodic wildfires that may suck, but for which sprouts pop back up again in the spring.