Why is there a kasrah in فَلْيَنْظُرِ الْإِنْسَانُ?

Lam al-Amr: Desired Actions

• The verb became منصوب.
• Lam al-Amr stopped governing.
• It is a temporary connecting vowel before hamzat al-wasl; the verb remains jussive.
• The word is a noun.