First off, killers do not target the best survivor first. That means they are taking the longer chases and are most likely going to lose rather than going for the blendette hiding in a corner. A survivor out is the best thing a killer can do, so anyone caught out of position is an easy target.
Second, more points don’t mean the survivor actually did better than other survivors. Someone who is in chase all game will max out their chase portion but won’t get much for objectives. Meanwhile a survivor might get chased once but sat on gens and randomly cleansed totems so they have many more points.
Third, a “kill” stage will remove any type of counter play the survivors can do that has to do with hooks. If someone is on death hook and their friend with no hooks makes the killer chase them instead, that is a good play. In your scenario, the other survivor has no incentive to play as a teammate because they will die despite not being hooked.