He’s not saying he wants to be “cured” of early rising, he’s saying that he wants to be an early riser, but in order to do so he needs to get a full night’s sleep without interruption.
Before taking this brand of CBD oil, his sleep was consistently interrupted at 4am. He’s not claiming that there is something objectively wrong with waking at 4am, but 4am is probably one or two hours too early for him. The interruption at 4am made it difficult for him to get restorative sleep, and the CBD supposedly stopped the interruption.
I believe one should assume that the author’s sleep needs, the time he falls asleep, and his definition of “early riser” might differ from one’s own. Maybe he’s falling asleep at 10pm, and wants to wake up at 6am, to get eight hours of sleep? In that case, it would be subjectively bad for him to wake at 4am. But he’s not saying that it’s bad that you wake at that time. You do you!
