Hustle culture tells you to "sleep when you're dead." Elite performers know that sleep is when the body repairs and the brain consolidates learning.
Productivity vs. Activity
When you are sleep-deprived, your prefrontal cortex shuts down. You might work 14 hours, but you produce 4 hours worth of value. That isn't productivity; it's masochism.
Treat your sleep like a job. Sustainable productivity is a marathon, not a sprint.