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"Now try the same level of accuracy in the dark, with 40 kts of wind when you can't see the target/hook and you are placing the hook in the hands of a guy who is struggling to stand up on a fishing boat in 6M seas!"
Yes, with the help of autohover, a copilot and an aircrewman coning you.
As it says above, the pilot can't see the guy on the deck at the time the hook is placed in his hands (unless the aircraft is fully coupled in autohover and he is looking at the flir). Team effort getting that hook into his hand.
For my two cents, I think a reasonable sling pilots could get the tree into the truck without too much of a problem but that chap does it with a particular finesse.