As someone who has been healing from burnout for almost 2 years, can confirm this is critical. But the thing they don't tell you is what being forced to rest and do nothing does to you. It's not just about work either. If you put in the work to understand what happened and why, it can turn into a really positive, life-changing experience.
For some people, I'd even say the earlier it happens the better. The sooner you unlearn bad thinking patterns and understand what the modern world does to people's minds, the easier it gets to find peace and happiness in your life.
Burnout happens when you work too hard with not enough meaning.
"He who has a why to live for can bear almost any how" — Nietzsche