I have seen firsthand the power Satan and our Gods have over life and death. There is nothing they can't cure, that includes physical injuries and the like, it's just that just because they can, doesn't mean they are obligated to do so.
Our Gods want us to learn to care for ourselves, which means that in most cases when SS have ailments or health problems the Gods will advice them on how to rid yourself of these, and get back in good health, rather than take care of it for us, even though they would be fully capable of doing so for us.
It doesn't help them or us if they did so. Our Gods are very busy, and we are far from the only planet they are watching over and protecting from the enemy alien menace. Dealing with every little issue for our people here, or wasting energy saving a few small lives is simply not worth it in the grand scheme of things, but our Gods definitely help SS when we are faced with things we cannot handle and often our Gods give rewards and blessings to those who work hard in Satanism to improve themselves and do spiritual warfare.
All "incurable" diseases are curable and with the right knowledge, all too easily. One must remember that the physical and spiritual are interconnected, a healthy body supplements a healthy soul and visa versa.
Any physical ailment or illness can be seen on the soul, often before it manifests, and can be cleaned out from the soul, which can manifest in unexpected ways.
For example, if one has cancer and has a tumor, it is possible to completely reverse this with spiritual workings alone, so long as one does not make it worse by engaging further in carcinogenic substances or habits, but if one isn't able to do this due to lack of knowledge or energy, then doing a spiritual working to heal yourself from cancer can manifest in finding the best available medical cure for you, even if this is suboptimal or detrimental.
If one has terrible cancer for example, then chemo, as bad as it is, can safe your life and it is often easier to recover the side effects and damage done by chemo with spiritual workings than it is to safe yourself from a cancer that is likely to kill you otherwise.
I'm not sure how difficult it would be to cure HIV for example through spiritual means, but it is definitely possible. Any disease can be removed from te body, as any disease or virus has a spiritual pressence on the aura and soul, these things too are multidimensional and not only physical, meaning if one destroys these spiritually, the physical manifestation of these diseases and virus's will dissipate as well.
The deadlier and more resistant a disease or virus is, the more difficult it is to clean spiritually as these are also interconnected physically and spiritually, meaning the physical traits are simmilar on the spiritual level for these as well.
If you can catch the disease manifesting on your soul before it catches you physically, you can remove it really easily and completely prevent yourself getting sick. A strong AoP protects you from all health problems, and aura cleaning also cleans these from your soul, which in part cleans your body of these too.
Healing costs more energy than preventing. Keep yourself well protected and clean spiritually and do your best to live healthily.
If you run into serious health issues you can ask the Gods for help, and if you are a dedicated SS they will help you and can also help you heal your loved ones, just don't do anything stupid that jeapordizes your health and then complain if the Gods don't cure your self inflicted disease.