That's one of the main points, of course: you don't want your head knocked off by the boom during a tack or gybe while you're hauling nets or crab pots, so the dipping lug was favoured by fisherman in the days of working sail.
Yep. Except that you don't get the sail whipping across too quickly and making the boat roll violently. i.e. it's easier/safer than in a conventional gybe.
That's one of the main points, of course: you don't want your head knocked off by the boom during a tack or gybe while you're hauling nets or crab pots, so the dipping lug was favoured by fisherman in the days of working sail.