We all look at these issues through a different prism and form our ideas, opinions and methods of performing checks, especially the vital checks when flying a given type of airplane in a given environment.
I was not picking fly sh.t out of pepper with my scenario of a twin engine flying boat departing on a river with a X/wind. I only wish I had a dollar for every time I was in that situation during the thousands of hours I flew twin engine flying boats.
For sure most flying on sea planes is routine and fairly easy, however that is not the yardstick by which we should measure how we perform and operate an airplane.
There is a vast difference between flying an airliner in the multi crew concept and flying a sea plane single pilot...especially a twin engine one.
There is a poll on Avcanada asking how sea plane pilots conduct check lists.
89% said they use the flow method.
11% said they used written check lists.