It does not make sense...
The aircraft mode of paratrooper can spawn land unit immediately when attacking, but it needs several hours to convert into a land unit when it is not attacking.
It's obvious that if a paratrooper can immediately turn into a land unit in a combat situation then it has to do the same in a non-combat situation.
Historically, In a non-combat situation, everything is much easier than in a combat situation so that detail needs to be improved.
The aircraft mode of paratrooper can spawn land unit immediately when attacking, but it needs several hours to convert into a land unit when it is not attacking.
It's obvious that if a paratrooper can immediately turn into a land unit in a combat situation then it has to do the same in a non-combat situation.
Historically, In a non-combat situation, everything is much easier than in a combat situation so that detail needs to be improved.
"Any man who must say, 'I am the king' is no true king." - Tywin Lannister