I applaud your optimism and share it. Things are bad but we have the tools and the capability to replace and rebuild that which has been infected and turned against us. Meanwhile, every day more people on the margins grow sick of the mess created by this cult.

Another thought experiment, to really drive things home. Assume the world is overpopulated, and that the ecological strain this creates dooms the human species to extinction. The problem can be solved by eliminating 99% of the population. Doing so will result in humanity existing more or less in perpetuity. The extermination of billions of actually existing, flesh and blood humans is then justified by the lives of hundreds of billions of hypothetical future humans.

Point being, the cult's mindset does not require those 5 people on the trolley to even exist. In fact, there's a strong psychological pressure to simply invent them. Oh, we killed more people than we saved, in the real world? No problem, we'll just imagine more people into existence, and count them as among the saved - see, we're the good guys again!