Thanks for the mention and invite @nsijoro. I have read through your thought-provoking article and questions there in. But I will like to respond to the one that concerns me. I respect people's view on blood. Everyone has reasons for whatever thing they choose to do. When it comes to blood transfusion, it is a matter of religious issues rather than medical issues. Read below for explanations on my stand.

... to give me reasons why Jehovah's Witnesses don't accept blood from others; maybe some reasons are above.

The reasons can be found in the articles I have shared their links below. Ask further questions if you aren't satisfied with the answers given.
https://www.jw.org/finder?wtlocale=E&docid=502013211&srcid=share

https://www.jw.org/finder?wtlocale=E&docid=502013147&srcid=share