Second point: strapping down boats should be done methodically. s*** goes wrong when you are in a hurry. no need to reef the straps down with crushing strength, you’ll deform your plastic rotomolded boat that way. straps bow and stern are the ones notorious for being over tightened. I consider them insurance Incase I have rack failure or stap failure. They keep everything attached to the vehicle while you figure out what broke and make the scary noise on the interstate.
I will let others help me load but when it comes time to tie down the boats I am the one to do it, no one else. The boats on top of my Cruiser are my responsibility therefore I want them tied down the way I am accustomed to doing it.