Any serious athlete knows that rest, recovery, and periodization (smartly modifying intensity based on goals, performance, and ability) are absolutely crucial to optimal performance (aka kicking ass).
There is a massive trend in the fitness industry to glorify exercise as an all-out war on the body. I call it the militarization of fitness—all the boot camps, Marine-inspired workouts, ridiculously intense body building routines, and general glorification of pain. Even our recovery and regeneration techniques are prioritized by how painful they are. (Got a knot in your hip flexor? Go roll that sh!t with a baseball!)
This trend is a symptom of a much larger disease. We live in a culture obsessed with aggression, and it has found its way into every facet of our lives, even our workouts.