Re: You are NOT "FISHING"
I had a commercial salmon troller, identical to the picture, out of San Francisco. Once we were "outside" about the only major concern was ships. We purposely avoided areas where the recreational charter boat fleets were. There can be a lot of gear configurations.
The critical part is to keep the lines separated. I never had a tangle I could fix in 10 minutes. Sometimes, although rare, it was a cut and re-tie situation. tight turns can be a disaster.
Not knowing the exact gear configuration the troller had it is hard to guess how "restricted" he was in changing course. However, my guess is that the skipper of a commercial boat, in the process of trying to make money, no doubt feels everybody is beneath him. Perhaps like some sailboat racers we encountered in SF Bay when we later had a sailboat. Maybe it is human nature for one to think whatever he is doing is far more important than what others are doing?