I agree - I do try to respect someone's choice about it too, but tbh, I fail to see a justification in not donating. I really do believe if you would take an organ, you should give one. If you need one, it is coming from someone just like you who had to make the decision one day - their decision saved your life, so you should extend the same thing to them, in theory, I think. :)

Donating to science is a huge step further and I appreciate if people don't want to do that. But it's so important to train students and also for researchers to work on - so it benefits live patients and future generations. :) Your friend is really awesome for donating her brain! If it helps someone with MS like her then it must be so worth it.