In a national disaster relief effort should we prioritze taking blood from fat people more than thin people?
Technically fat people have more blood to give.
Someone who weighs 300lb vs 150lb would have 150ml of extra blood sloshing around in them.
Think of it, in a national disaster we would mobilize (though slowly, and with a lot of sweating, and puffing and swearing) an army of obese individuals to rapidly contribute to the national blood supply.
I am not saying my logic isn’t flawed, but it is an interesting mental exercise.