Hate to say it TristanAlting, but you have still got it wrong.
The davits are not what the boat sits on, but the big three sided 'davit' that moves to launch the boats. These are very strong to take the weight.
The blue things are what we are talking about in that photo that Thiel posted. Which is why I recommended moving the boats around. Have the heavy boats and davits as near to the middle of the ship as possible (helps with stability), with the two smaller boats aft of them where the crane can pick up and launch them.