What is your opinion of those who say that in this age, the focus should be on tawhid al-rububiyyah (oneness of lordship)?

Question:
May Allah reward you, Honorable Shaykh. This questioner asks: Is this phrase or statement correct? We focus in this age on tawhid al-rububiyyah (oneness of lordship) and make it the foundation; because some people have tawhid al-uluhiyyah (oneness of worship), but they mix it with some impurities, such as visiting graves and swearing by the awliya (close friends of Allah). So tawhid al-uluhiyyah (oneness of worship) does not remain except with tawhid al-rububiyyah (oneness of lordship). What is your guidance?

Answer:
Tawhid al-rububiyyah (oneness of lordship). No one denied it, even the polytheists. If focusing on it were sufficient, the Messenger (peace and blessings be upon him) would have been content with it.
The Messenger did not call to tawhid al-rububiyyah (oneness of lordship) because it was already established and present; rather, he called to tawhid al-uluhiyyah (oneness of worship). All the prophets called to tawhid al-uluhiyyah (oneness of worship). Every messenger said to his people: They did not say, "Acknowledge that Allah is the Creator and the Provider," because that is already present. On one hand, this is the case, and on the other hand, this is not sufficient for entering Islam. So whoever acknowledges tawhid al-rububiyyah (oneness of lordship) and stops there does not enter Islam, and does not enter Paradise until he adds to it tawhid al-uluhiyyah (oneness of worship). For this reason, they said that tawhid al-rububiyyah (oneness of lordship) is implied in tawhid al-uluhiyyah (oneness of worship), and tawhid al-uluhiyyah (oneness of worship) is included in tawhid al-rububiyyah (oneness of lordship). So both are necessary: tawhid al-rububiyyah (oneness of lordship) and tawhid al-uluhiyyah (oneness of worship). Tawhid al-rububiyyah (oneness of lordship) is established among all nations. As for tawhid al-uluhiyyah (oneness of worship), it is rare among people; only a few nations held fast to it. There is much disagreement regarding it, and the disagreement continues even in this Ummah (Muslim community) today, in the worship of graves, the worship of shrines, and the exaltation of the awliya (close friends of Allah) and the righteous to the extent that it is believed that they act in the universe and share with Allah (Mighty and Majestic). It is said that these are karamah (a miracle granted to a righteous person) and the like of such superstitions. So the result is that it is necessary to focus on tawhid al-uluhiyyah (oneness of worship) because there is disagreement regarding it, both in the past and the present. As for tawhid al-rububiyyah (oneness of lordship), there has been no disagreement regarding it, neither in the past nor the present. Everyone acknowledges it except those who deny and oppose it, like Pharaoh and the materialists. These people are not to be considered because they are outliers in the world. Moreover, they acknowledge it in their hearts. Whoever denies tawhid al-rububiyyah (oneness of lordship) outwardly acknowledges it inwardly.
Because he knows that this universe must have a Manager, must have a Creator, and must have a Lord who takes care of it and manages it. This is by the consensus of people of intellect. This is clear proof that this universe has a Creator, and He is Allah (Glorified and Exalted is He). No one denies this.