Which statement correctly explains the aspect “Wishing for the impossible” in the example “لَيْتَ الشَّبَابَ يَعُودُ يَوْمًا”?

Inshāʾ and Tamannī: Requests, Wishing, Exhortation, and Reproach

• Subjunctive after fāʾ — If only you came and spoke with me.
• Past and present verbs — Why do you not do it? / Why did you not do it?
• Two senses of inshāʾ — Inshāʾ can denote the utterance or the speaker’s act of producing it.
• Wishing for the impossible — Would that youth might return one day.