Why is it that when discussing Allah's sole right to worship, only His power is mentioned, and that He is the One Who benefits and harms, and that He is the Creator and Bestower of blessings, but it is not mentioned that He commands only good and forbids only evil? And if Allah did not command justice and beneficence, would He still be worthy of worship?

Allah, the Almighty and Majestic, has the absolute right to be obeyed and worshipped, because His commands and prohibitions are issued only in accordance with wisdom and for the realization of benefit. All that He commands is good for those obligated, and the doer of it is praised. He forbids only evil that is contrary to perfection. Indeed, Allah the Exalted has denied commanding indecency, and has affirmed His command of justice and equity, and has called for the dedication of worship to Him alone.