Citation is needed for this:

> It's not starving, not having healthcare etc that makes you sad so much I think as thinking others are getting it while you are not…

While social comparison is proven to be part of happiness, the science is quite strong that starving or being sick makes someone unhappy.

I said that I thought not having eg. healthcare doesn't make you as sad as not having it while someone else does.

Nothing I've used in that relative comparison breaks the science you quote. And I do not need a citation to think something rather than to state it is fact. It would be odd indeed to require a citation to think of something.