I think they have a timetable which is absolute. You cannot blame the individual workers, they just do as they are told. I don't think the people who arrange the schedule know much about wildlife or wild fruits either, they are just interested in keeping the road or lane clear. You could try writing to your local council, but I don't hold out much hope. The best way is to hand cut, but they obviously can't afford this so just send out a mechanical cutter probably twice a year.