Allah's wisdom in delaying punishment

وَمَا كَانَ ٱللَّهُ لِيُعَذِّبَهُمْ وَأَنتَ فِيهِمْ ۚ وَمَا كَانَ ٱللَّهُ مُعَذِّبَهُمْ وَهُمْ يَسْتَغْفِرُونَ

But Allāh would not punish them while you, [O Muḥammad], are among them, and Allāh would not punish them while they seek forgiveness.