I don't think the worker was very professional at all, but since (male) Karen kept harassing them while they were working, I can't really blame him...besides, he's got guts to take his shirt off if you ask me...I'm in way better shape than he is and I'm lucky when I feel confident enough to at the beach, or even at home...lol...but if I were worried about the blower noise I'd let them finish because harassing them will only make the job take longer
Years ago I saw a study that men who frequently see breasts have lower rates of heart attacks and stress. Maybe the worker was trying to defuse the situation by showing the male Karen his boobs.
Joking aside, the employee shouldn't have blown a fuse like that. If he did beat up the annoying guy the company would have been in for a major lawsuit.