Nah, the unique tragedy is that some humans want to live forever in a mushy world where everything complicated will eventually crumble and rot. Cancer has been right there for millions of years and the pretty slick biological "intervention" was to just continually be spinning up new generations with a clean slate of cells. It seems to work great on the level of humanity as a whole, and countless tools have been offered to help individuals wrap their head around their individual material mortality. No understanding of cancer or bodies required; no magical chemicals needed; no violated "shoulds" involved.
That you may now stare at a cancer and panic isn't a universal part of "human existence", it's just a struggle that some individuals see themselves trapped in when they've lost sight of the bigger picture.
That's not to say that medical inventions aren't cool, or that they shouldn't be enjoyed, but the starkness of what they're set against is a very personal and subjective thing. What's tragic is that so many people seem cursed to stare at that darkness these days and lack insight into there even being some very robust alternatives to doing so.