Most incidents are really only explainable by the captain.
However, since it was told that they were coming into the harbor, in 20 knots I'd have had that outboard down and running before ever reaching the entrance. Just in case. Appearances be damned. I'd rather be accused of dark-side sailing than having to play hopscotch on the breakwater.
I can't be certain, but the motor looked like a Honda 9.9 long shaft. This is a Power Thrust motor with more than enough capability to push a 26 footer around. I'd have gunned it and swung the bow to port. It even has respectable reverse, if employed late. The waves were not rocking the boat enough to render the outboard useless, prior to his approaching the rocks.
I had a Capri 26, 6,000 lbs, and the Honda 9.9 pushed it around with ease, even in a strong headwind, and delivered a good punch for getting up speed. Once under way, the stern squats and the motor digs in.
When he discovered that he couldn't tack to port, he could have put her in gear and saved the day. Or just have motored in to begin with.