Because your enjoyment of the Qur'an will increase when you understand its stories.
And because the stories of the prophets are not just a story that happened and its time has ended, but it contains principles, values and attitudes that we can benefit from in all our life dealings.
To the extent that our Lord was patient with our honorable Prophet Muhammad - may God’s prayers and peace be upon him - with these stories!
Their mention in the Qur’an was a message to our Prophet, and after him to us.
Our imitation of them is what will lead us to the paradise of eternity and promote us, so God will unite us with those we resemble on the day we meet Him.
That is why we will live with them in this series of stories
We know their message and the details of their lives, and we learn from each of their prophets a trait.