Under your rules we can morally eat people in comas.

Ah, I agree! If fruits and vegetables deserve moral consideration because they “want to live,” then coma patients, clearly not demonstrating any ambition, are demonstrably and ethically fair game. I mean, they’re just lying there, right? No subjective experiences, taking up valuable hospital space and depleting emotional energy while not contributing anything… a head of cabbage with a Medicare plan.

Waste not, want not.