Heedlessness and False Security

أَفَأَمِنُوٓا۟ أَن تَأْتِيَهُمْ غَـٰشِيَةٌ مِّنْ عَذَابِ ٱللَّهِ أَوْ تَأْتِيَهُمُ ٱلسَّاعَةُ بَغْتَةً وَهُمْ لَا يَشْعُرُونَ

Then do they feel secure that there will not come to them an overwhelming [aspect] of the punishment of Allāh or that the Hour will not come upon them suddenly while they do not perceive?