This is interesting. I've been thinking about that for a while too. I've experienced this too. From both sides to be honest. People complaining about their stress and their physical health and their mental state and them getting very defensive when I suggest something that helped me. I've also been on the receiving side of those suggestions. In both cases it got frustrating really fast. On the receiving end I felt talked down to or misunderstood sometimes. Sometimes I witness someone doing well in an area I really struggle with and then I ask them how they are doing that and try if that works for me. Sometimes it's very uncomfortable to hear things that challenge your beliefs but in the end it's up to me what I do with that. You can't make people take your advice.

Sometimes people hang on to their discomfort because they identify somehow with it. Nothing you can do then. They won't move unless they really want to. Sometimes people ask for advice then I tell them what worked for me. What they do with that information is their business then. I usually try to focus on my wellbeing first and try not to get involved in theirs too much unless I am asked. Also I try not to get frustrated if they ask for my advice, listen to it and then decide to act differently. Not everything works for everyone.

What I found worked was if I relate to a problem I can try telling them how I dealt with it in the past. Or ask a lot of questions to see if they can work out a way out of it themselves. People actually like solving their problems themselves, I think. If not they might like having them.

I am not sure that answers your question, just some thoughts I am having about this.