But then this doesnt mean going all out then
Like actual torture doesnt have people going all out. When the CIA is torturing people, going all out is pulling out a gun and shooting someone in the face. But they dont do that
See your problem.
for torture to work, you have to do enough damage to CAUSE pain. And then after a prolonged period of time like you say, the person might die. But again, you have to also make sure you arent causing TOO MUCH pain or else the person gets knocked out
Sanji would eventually die, but Black maria is not going all out. Going all out defeats the purpose of torture