Chronic stress is definitely detrimental, yes. However, humans respond to different situations in an individual manner and what causes harmful stress in one person may be ideal conditions to another. The subject of stress is a large one and mostly outside my area of knowledge.
We can take stress issue as:-
1. Acute stress
2. Chronic Stress
3. Acute relaxed Condition
4. Chronic relaxed condition
I am not sure whether individual differences in stress taking is normal or disordered conditions(in view of link). One can be taken as strong when not getting stressed but he can also have compromised immunity, so not feeling stress.
Opposite condition to stress is relaxed conditions(related to para sympathetic conditions(PNS)). Acute relaxation could be beneficial but what about when a person prefer to remain chronically relaxed? Whether this also result into compromising/tolerance of PNS & immunity related to it esp. stem cell system?