So the time spent by a Hertz employee is 1 minute to plug and then unplug the car.
And if the car isn't fully charged and someone wants to rent it, they can either wait additional 30 minutes for full charge or get not-fully-charged car immediately and charge it at a later time.
Either way, it's effectively zero time and cost to Hertz.
I frequently (pre-COVID) saw cars were literally being turned as fast as possible because people were waiting for them. The idea that an N (N << total number of EVs) car wide throughput problem with 30 minute cycle time isn't a bottleneck is insanely naive to me.
So the time spent by a Hertz employee is 1 minute to plug and then unplug the car.
And if the car isn't fully charged and someone wants to rent it, they can either wait additional 30 minutes for full charge or get not-fully-charged car immediately and charge it at a later time.
Either way, it's effectively zero time and cost to Hertz.