I've only skimmed through the post so maybe I've missed something. The way I see it you can't really compare a bow shape with a foil shape because the objectives are different.

The foils main aim in life is to generate lift and with lift comes drag. Obviously the lower the drag the better but if it generates lift it also generates drag,

The bow is not trying to provide lift and if the designer is on the ball among other objectives he'll look at minimising minimise drag.

I know that the voices in my head aint real,
but they have some pretty good ideas.
There is no such thing as a quick fix and I've never had free lunch!