Message vs. Compulsion

وَلَوْ شَآءَ ٱللَّهُ مَآ أَشْرَكُوا۟ ۗ وَمَا جَعَلْنَـٰكَ عَلَيْهِمْ حَفِيظًا ۖ وَمَآ أَنتَ عَلَيْهِم بِوَكِيلٍ

But if Allāh had willed, they would not have associated. And We have not appointed you over them as a guardian, nor are you a manager over them.