>Someone I used to work with, their wife was a professor at Rochester university and her research was around happiness. She would tell me that our baseline happiness in life is virtually constant (on large timescales, we all have good/bad days etc), there’s not much we can do to alter it in adulthood to shift it.

If you're someone who struggles with chronic depression this statement is extremely demoralizing. But it's also hearsay -- you're a stranger on the internet, so you want me to believe based on a stranger's colleague's wife's alleged research, that depression cannot be effectively treated?

If you want to share that researcher's work, provide a link. Keep your rumors, suppositions, and lay-person's doomer psychology to yourself, unless you are planning to make a post with direct citations that is in effect nothing like the comment you did leave.

People's lives depend on this. You can't just post "if you have depression you'll never be able to change it" cavalierly as though you are an expert and your post has no consequences.

Someone is going to read your supposition, your rumor, believe it, and despair.