To safe people in this world and the hereafter, then God has sent the Prophets and the his apostles and completed with holy books as well, which are collected in various scriptures. Furthermore, we also note, that the Lord has prepared Heaven and Hell, for believers and don’t.
My question is, to God the Supreme paced, why not create humans whose they were set automatically (as like angels) who always follow him. Thus, no need to send the apostles and prophets and holy books, so the system is not complicated Lord !?
This means then there will be no disbelievers (deny his will) and then do not have to also make Devils Playground. That is efficient.