Most people aren't going to read what you just posted on here...I was originally going to come in and put some too long didn't read meme and then I accidentally started reading your statement lol.
You don't get to the point until the last paragraph. The statement reads more as your family's health history than it does your reasons for becoming a physician. The whole essay should be focused on "why medicine?".
Remember: This is a sales pitch. What makes you unique? What will make you a great physician? What experiences have you personally had that show that you exhibit the necessary qualities to be an effective clinician? Just having family members who have suffered illnesses (however terrible they were or how much you were affected) does not provide enough reason for wanting to go into medicine.
I think you need to up the maturity level of your statement a lot. It reads like a twenty year old who hasn't had much experience in the medical field, who is reaching. I'm not saying that is who you are, but that is how it read to me.
Just as an FYI, I did not read it line for line, but rather skimmed it (similar to how most ADCOM members will).
Hope this helps. All was meant as constructive criticism.