Daily Curiosity- Cure for HIV/Cancer

So I am so curious as to why there still is no cure for diseases such as HIV/ AIDS and cancer. All of the money that is spent on unnecessary garbage, but we still have no cures for this horrible diseases. I mean the best thing to try to do is live a healthy lifestyle, eat well, exercise, be careful with your body (if you know what i mean), and all of those other things, but even living the healthiest lifestyle, no one is allergic to contracting them. Sometimes it just runs in the family or is passed on genetically which one can't really avoid. I know it is far from an easy task, but it still bothers me that we have no cure with all the money that we have squandered on meaningless things. Personally I don't believe they are looking hard. Don't get me wrong now, I do love this country, but maybe the government DID create HIV and the AIDS virus to slowly wipe us off the face of the earth. Why knows? But, I guess we will never truly know.