What made me a blood donator was that I almost needed blood transfusion myself. I was badly ill and my body didn't want to work properly, my blood values didn't want to get better no matter what the doctors tried. Eventually they told me that they need to transfer me to another hospital and do a blood transfusion if my values kept going worse.
I don't know what happened but slowly they started to improve and instead sending me to another hospital, I was released from the hospital.
That made me think about the topic and read about it more. I wanted to help others in situations like me.