I'm not expert either but the first robot gave up after just...

I'm not expert either but the first robot gave up after just ~100m what do you thing another will do for you?

Also the closes airport is Hokitika not Greymouth.........

Armchair speculating and blaming is one thing but actually forcing another human to go in is environment is another.

Remember making a decision is easy; living with the result is the hard part............

Bottom line is........29 Underground Miners.....are possibly waiting for somebody to come and help them but they would not want to die for them too.