Read the passage:
However, these stories were not always wholesome but contained murders, black magic, and demons, as well as many other evil things. But just as most people remember The Arabian Nights only for Disney movies like Aladdin, modern scholars often focus only on Harun al-Rashid’s good deeds and often forget that he was also a ruthless military leader.

Which identifies why the stories in The Arabian Nights are not always wholesome?

They contain murders and other evil things.

They are about Harun al-Rashid.

Harun al-Rashid did many good deeds.

The movie Aladdin is based on a story from The Arabian Nights.