The speech here is about the Resurrection day. Allah (swt) proves His Mighty in creating humans from disdained liquid in utmost care but there has to be something in return.

This Surah contains the two edges of existence, the originate of the creation in this worldly life and the return in the hereafter. As such this worldly life is very short and very small in comparison with the whole time. Moreover, it is not the goal rather a means for the greatest and everlasting aim. Considering Allah’s (swt) care of us in this life, then how would it be in hereafter?

Consequently, speaking about the first creation led to the speech about the re-creation in the hereafter.

Allah (swt) has not created humans just to enjoy this life, rather, has created them to enjoy the relation with their creator Allah (swt) by following His methodology.

However, returning after death is absolutely possible. As re-creating of the dead in the judgement day is the same as the water is reproduced in the universe.