Why does a disabled person have to pay a ransom (Kaffara) in spite of being exempted from fasting

Next point, if you like regarding the situation of a disabled person, why is it a disabled person has to pay a ransom due to the fact they haven't fasted, unless isn't the Quran in surah baqarah chapter number two was 284. That if it is difficult for a person to fast, you can either fast appear and that is feeding of an indigent person or a poor person. The reason is that if a person is disabled, or if effect permanently and there are no signs that he will become healthy, where he can observe fast, so the question of him compensating

or the question for him to keep the fast later on, doesn't arise at all. So that is the reason for him. There is a ransom that he has to pay something that is equivalent to feeding an indigent person or feed indigent person for every fast that he has missed.