What is the wisdom behind the abundance of verses indicating the oneness of lordship, given that those addressed by this Qur'an acknowledge the oneness of lordship?

The questioner : Your Eminence, what is the wisdom behind the abundance of verses indicating the oneness of lordship, given that those addressed by this Qur'an acknowledge the oneness of lordship?
The Shaykh : Yes. It is to establish the argument. ... But if they affirm it, they are obligated to affirm the oneness of worship.
The questioner : But some of the callers to Allah who call insist on calling to the oneness of lordship, even though people need the oneness of worship, and they cite the abundance of verses in the Qur'an for this?
The Shaykh : This is like what I said: if he were addressing people who deny the oneness of worship, meaning they deny the oneness of worship, then he should increase the mention of verses regarding lordship. But if he is speaking to people who acknowledge the oneness of worship, he should bring them other verses: verses regarding the attributes, verses regarding the actions of Allah.

The Shaykh : Are they Muslims? If they are Muslims, then lordship can be mentioned in order to increase their faith.