Drinking too much alcohol has bad consequences.
I believe the same goes for working too much.
This is, of course, true by definition: “too” much. But how much is too much?
Just like the amount of alcohol you can “responsibly” drink depends on your body mass, whether you ate properly, how tired you are, how old you are, and which situation you find yourself in, so does how much you can responsibly work.
But some amounts of alcohol are always too much. Maybe some amounts of work are always too much, too.