Attempting to subvert the thought experiment only makes things worse. The trolley is full of child prodigies, all future geniuses that will cure cancer and solve the world's problems. By sticking the lever halfway you kill all of them. The only way to save the child prodigies is to choose, left or right.
You couldn't even bother putting in adult scientists that have already helped the world. It's a hypothetical scenario, you know, you can put in anyone you want. So I'm putting the child prodigies to a test by having the save themselves from the half-lever. Should be relatively easy for them.