What he did when he was ill, and tie it and rely

Look at the practice rather than the argument. In his final illness he recited the last surahs and blew over himself, and passed his hands over his face, and Aisha did the same for him. When somebody in the household fell ill he blew over them reciting the same surahs.

Quiet, domestic, at home. That is what ruqyah looks like in the sunnah.

And for the person who fears that a doctor means a failure of tawakkul, there is a man who left his camel untied and said he was relying on Allah. Tie it, and rely upon Allah. Graded hasan in Tirmidhi. The tying is not the opposite of the reliance. The tying is what reliance looks like in a body with hands.

Ibn al-Qayyim says the same thing about treatment, in al-Tibb al-Nabawi, and he says it harder than this course has been saying it. He writes: وفي هذه الأحاديث الصحيحة الأمر بالتداوي وأنه لا ينافي التوكل كما لا ينافيه دفع داء الجوع والعطش والحر والبر بأضدادها بل لا يتم حقيقة التوحيد إلا بمباشرة الأسباب التي نصبها الله مقتضيات لمسبباتها قدرا وشرعا وأن تعطيلها يقدح في نفس التوكل. Our rendering, and not a published translation: in these sound reports is the command to seek treatment, and that it does not contradict reliance, just as repelling the affliction of hunger and thirst and heat and cold by their opposites does not contradict it. Rather the reality of tawhid is not complete except by taking up the means that Allah has appointed as causes of their effects, by decree and by law, and neglecting them impugns reliance itself.

Read the last clause again. He is not permitting the means. He is saying that leaving them alone damages the very reliance they are supposed to be given up for.