It's true that there has been some progress in treating most cancers and particular success in treating some specific cancers e.g. with checkpoint inhibitors. B

It's true that there has been some progress in treating most cancers and particular success in treating some specific cancers e.g. with checkpoint inhibitors. But lung cancer is both one of the most common forms of cancer (it's still third even with the massive decline in smoking) and has a much lower 5 year survival rate than the other most common cancers, breast and prostate. The massive decline in smoking has played an outsized impact on the improvement in reducing both cancer rates and deaths from cancer generally