Life is crazy, a person could be literally gaining weight and their life is in danger and another person could be losing weight and this would also signal great danger to their health. Health symptoms can be relative and distinctive.
Positive or negative can either be a good or bad thing: positive for HIV is bad but positive for pregnancy is good at least to couples who are expectant.
Weight loss
To the regular medical literature, losing weight for a lot of people means a very good thing. I remember telling somebody that I was losing weight rapidly and they actually thought it was a good thing
People forget that a person can lose weight unintentionally and this is when we begin to suspect things like cancer, anemia or malnourishment.
This is why I think losing or adding weight is relative depending on the circumstances and whether it is intentional or not. When you do not intentionally aim to lose weight but do so, then there might be medical emergency.
I started losing weight when I lost my only brother, I was already a skinny guy, and to lose weight again meant that I get to see my ribs through my skin and my cheek bones.
It wasn't like I wasn't already going through a medical condition, but I going through a period of depression and being broke too, and this made me lost crazy weight.
I still haven't regained the weight I lost, despite it all, but then I think a lot of people would give anything to lose that much weight, and I can actually give anything now to add some weight.
Need & Want/Good or Bad
Life is relative with people unique needs and wants, and this is why sometimes we look at the trajectory of life, listen to the story of different people and wonder why life gives you more questions in place of answers.
There is no good or bad when it comes to the human experience, sometimes it is the uniqueness of our experience that defines what is good or bad. People justifies things that favors them even if that same thing or situation is dangerous to another person's life or existence.
This is why bad things or bad people triumph in life
People cannot collectively say something is bad, especially because that state of "badness" of that thing does not equally affect people like the same time and these applies to "goodness".
Benefit/problems
Back in the day, a lot of people benefited from slavery, even if a lot of people suffered from it and lost their lives through it. In the 21st century some people are also benefiting from racism, wars death, nepotism, religious bigotry and sickness.
This is why there can never be a resolution to all the bad things that are happening in life; circumstances, good or bad effects people unique and different.
Knowing God and understanding his commandments, having a sense of humanity takes away a little bit of any selfishness that might be inherent. This is why the bible says love God and love your fellow man.
When we love OTHERS, it's possible to actually look at a circumstance and call it for what it actually is and not let the sense of self actually influence our stance.