[vaylian]

Because health is a limited resource. It might not be apparent to you now, because you are still able to put in the long hours "as a young professional", but at some point things inside you will break and if you don't give them time to heal, they will never go back to their original quality.

If overwork is mandated by your culture, you will not find the time to heal, thereby starting a downward spiral. And with so much competition, there will be only few winners and lots of losers. If you lose, the sacrifice of your health will have no benefits and there is no way to get it back.

Life is not about work. Life is about living. And health is essential for living.