"Most of the things people get treated for have nothing or almost nothing to do with genetic conditions."
Almost completely incorrect. Got the flu? Well that's because the flu virus latched onto a receptor that let it get into your respiratory cell. That receptor could be mutated in you.
Got into a car accident? The surgery is painful. They're going to give you an anaesthetic. Your response to the anaesthetic is going to be governed by genetics. The pharamacokinetics - how much anaesthetic you'll need - governed by genetics. Maybe the current standards of care will kill you.
"While having unlucky genes could decrease the chances of survival, ultimately everyone can get cancer."
Thanks for making my point for me. Cancer is extremely genetic. Got a mutation in BRCA? You're going to have an elevated (or possibly reduced) risk of breast and prostate cancers. And especially, individual cancers' response to drug treatments is going to be partially stochastic and highly dependent on the underlying genetics.
"As a European conservative, I truly believe that no life is unnecessary, no life is wasted."
Hypothetical: You see, I'm a biomedical engineer (true). Let's say I build a machine that can keep anyone alive. The machine is great, the quality of life for the user is awesome. And it's such a great machine, it works indefinitely. Here's the catch. To operate the machine takes 400 barrels of crude oil a day. There's no way around this. Now. If health care is a right, and no life should be unnecessary or wasted, then do people have a right to this machine?
Just to be clear, I don't think that no life is unnecessary or wasted, I just don't think that health care is a right, and I think that people need to accept the fact that they are going to die someday, and it's not such a horrible tragedy if medicine cannot save them, even if a possible cure existed and the only reason why they couldn't get access to it due to money. Obviously, I am not heartless and I think that situation should be minimized, via charitable actions - and I think that any system that tries to cover everyone will wind up costing everyone more and having rapidly diminishing returns in the face of reality, and will also really screw over corner cases. If such a system has the capacity to appropriate money from people against their will and the authority to make decisions for people, then the costs and the injustices will pile up even faster.