The framing leads many people to pick blue for its altruistic framing. Enough, in fact, that 50% quorum is honestly not difficult. A lot of red-advocates seem to have a False Consensus Effect going where they're convinced way more people than in reality will interpret this "dilemma" as "do you step in the human grinder in hopes of jamming it", and act accordingly.

A 70% or 90% requirement, or just explicitly framing it as "do you step into the human grinder" would make it vastly easier to aim for 100% red, but we're dealing with the literal words of the "everyone lives button" here.