More than that. There's a pretty well-established link between long-term heavy stress and a huge number of health issues. Definitely heart problems, but IIRC also immune system health and strokes, and perhaps even cancer.
If you don't believe me, no, I don't have any documentation handy...
How to make stress your friend | Kelly McGonigal: https://www.youtube.com/watch?v=RcGyVTAoXEU
People that suffer when stressed, feel bad about stress.
I view the feeling of stress as not a bad thing, but as my body trying to give me more resources to overcome my situation. If I'm feeling stressed, my heart might pound and I might breathe faster-- but that's getting more oxygen to my brain.
It's not talking about "good stress" or "bad stress".
^ The leading causes of death in the US.
Maybe if we didn't work so hard, we would be happier and healthier, which would in turn would create a positive feedback loop because we then wouldn't have to pay so much for medical insurance?
Usually, the health problems start some time after the stress. So unless stress is able to travel in time, it is more likely to be a cause than a consequence.
Stress can cause illness and disease. Illness and disease can cause stress.