What is it about yachts in films?

Why doesn't anyone ever make a vaguely plausible depiction of sailing in a film?

The yacht in this case was accurately referred to as a "SCOD" during the opening scene when the boys negotiated the price. This was an unusually accurate description of the yacht which is, in fact, a South Coast One Design, a late fifties British yacht design and a minor classic.

Fast forward to the sailing scene, and there is the yacht blazing along with only the mainsail up and going at about twice the speed it would be capable of in that configuration and in those conditions. It looked incongruous and ridiculous, they were obviously running the auxiliary engine to enhance the speed. If you are going sailing, put the damn sails up. Yachts are photogenic, why not show them in at their best?

I note they didn't show the classic Jag sports car going at 140 mph down the country lanes so why show the yacht going twice the realistic speed it would be travelling?

It was unnecessary to mess with what could have been a pleasant scene.

It happens all the time, yachting scenes are a joke when depicted on film. I can't think of a realistic one I've ever seen, but then look what the movie industry does with car chases..