«وَهُوَ غَلَطٌ»
And this is mistaken.
The text criticizes some consequences of treating apparent shortness or length as sufficient for classification. A formulation longer than ordinary speech can be justified by the occasion.
﴿رَبِّ إِنِّي وَهَنَ الْعَظْمُ مِنِّي﴾
My Lord, my bones have grown weak. (Maryam 19:4)
The image of weakened bones communicates more than the bare report 'I am old'. Mere extra length is not a rhetorical defect when it carries such force.