Why is it not permissible to enter the state of ihram for 'Umrah from inside Makkah?

Question:
He says: Honorable Shaykh, may Allah grant you success, what is the wisdom behind entering the state of ihram outside Makkah, that is, at the five miqat boundaries or at the lowest point of the halal area? He says: What is the wisdom behind entering the state of ihram outside Makkah, that is, at the five miqat boundaries or at the lowest point of the halal area?

Answer:
My brother, entering the state of ihram for Hajj is permissible from Makkah; there is no obstacle. This is only for 'Umrah; one does not enter the state of ihram for 'Umrah from Makkah. They said that if one were to enter the state of ihram for Hajj from Makkah, he would go out to the halal area to perform the rites, exiting to the different areas, so he would combine the halal and the haram in his rites. This is unlike 'Umrah, for all of its acts are in Makkah. If he entered the state of ihram for it, he would not combine the halal and the haram. Therefore, one does not enter the state of ihram for 'Umrah from Makkah, because all of its acts are in Makkah, so he does not combine the halal and the haram in it.