If one believes humans evolved from a state that would have been considered an animal prior to the evolution, then our emotional capacity and understanding in and of itself is a product of evolution. The theory of evolution also includes that evolution takes place as a process of adaptation, often overcoming adversity, or environmental changes that require adaptation to overcome (so that the environmental differences are no longer an adversity).
Within that context, humanity as a species evolves emotionally, or is at least capable of it, in addition to other ways.
If all of that is true, then the only way humanity would continue to evolve emotionally is if there is emotional adversity, or greater needs for emotional capacity or functioning that are presented.
Which in a way would mean that without people in the world who require greater empathy and emotional depth from others in order to survive in their societies, humanity’s emotional evolution would be stifled.
So in addition to all of the little ways that anyone, regardless of MI or not, can have a positive impact on their immediate environment and those close to them, I think it’s also important to remember that as a person who struggles more than most, you are part of a much greater and very important process for your kin.