I'm not going to comment on all the mixture of ideas you have come up with, but stick to one thing that I see as the problem when it comes to types of illness.
When we, the people God created on this planet, decide that we know what is best for ourselves and come up with man made short cuts for our lives when it comes to health and every day living, we find that all we have done is short changed ourselves. The bible is full of good advise on being healthy...there is no secret or religious cover up. All you have to do is read it for yourself.
A person can not break the natural laws God has set up for our bodies and for nature to run correctly and expect to be healthy.
Being cursed with the same health issues one's parents had, many times is due to the fact that the parents/grand parents broke these same natural laws as well and are physically weaker. They then passed on that weakness to the next generations. As each generation comes up with their own new life short-cuts, they add to the curse that they already had.
We can either place blame on our family tree or how God does things, or we can make the best of what we have and work on improvement from our/others past mistakes as a sign of repentance.
Hope you find what you are seeking.
Matthew 6:33
33 But seek ye first the kingdom of God, and his righteousness; and all these things shall be added unto you.