Why do the people of kalam focus on tawhid al-rububiyyah (oneness of lordship)?

Question:
He says: Honorable Shaykh, may Allah grant you success, why do the people of kalam focus on tawhid al-rububiyyah (oneness of lordship)?

Answer:
Because they did not know the reality of tawhid. They did not know the reality of the tawhid that is required. They want to refute the atheists in their claim, without refuting the atheists who deny the existence of the Lord.
They want to prove the existence of the Lord, and this is not sufficient. Even if they prove the existence of the Lord, it is not sufficient. They must single Him out in worship. They must acknowledge His uniqueness in lordship and single Him out in worship. So they did not bring a valid argument. What they brought in their beliefs, focusing on tawhid al-rububiyyah (oneness of lordship), this exists.
It exists in the Qur'an. The testimony of the Qur'an is against them. And now they do not deny this. But this is not sufficient. Tawhid al-uluhiyyah (oneness of worship) is necessary. Yes. Also, you see that those who focus on tawhid al-rububiyyah (oneness of lordship) hold that shirk (associating partners with Allah) is only in lordship.
He says: They believe that one who creates and provides sustenance with Allah and manages affairs, but as for uluhiyyah (divinity), they have no mention of it, nor any reader who understands. So they focus on this, on the atheists who deny the existence of the Lord, and on those who associate partners in lordship, and they are few. And then they did not bring anything of value. This exists.
This is the dead end in which they exhausted themselves, wrote books, and taught it in universities, schools, and mosques. All of it did not bring a speaker, because in tawhid al-rububiyyah (oneness of lordship), no one differed on it. Even if they acknowledged it, it would not save them from the Fire until they bring tawhid al-uluhiyyah (oneness of worship). Yes.