It seems to me that there is a popular and strong belief that if you reach enlightenment, and thus have four immeasurables, you can help a person without making them feel extra suffering or fighting back. This can be illustrated by the sutta Aṅgulimāla. The Buddha can stop him easily and effortlessly. The premise here is that
enlightenment = perfect knowledge, and/or
four immeasurables = you and the others are truly the same, so that you can understand that person inside out.
The equal sign
= is more like
implies that rather
However, realistically, I think this is impossible. There are situations that achieving enlightenment does not mean perfect knowledge. For example, you can reach enlightenment in a radioactive region. This is not loving-kindness yourself. Likewise, one can never claim to perfectly understand the inner state of the other person, especially without face-to-face conversation. What it seems to be true is that
enlightenment = having no distortion, and/or
four immeasurables = being able to vision a way to help the others getting out of their suffering.
Perhaps this is just a matter of defining what
enlightenment is. This is fine. But in this case, its necessary consequence is that no human can achieve this state (though can absolutely achieve mindfulness or practice eightfold path).
Is this correct?