I suppose on one hand your right and I shouldn't walk on a tiled roof. But in my area I'd be the only windy who doesn't I'd probably lose a fair amount of customers as a result. I know the answer is wfp pole but i'm just starting out in this game and until i'm making more money its not an option.
If you slip and fall and break your neck, you won't be a windy at all, and won't be able to save up for a pole system.
So the custie says it is safe to walk on the roof, so you walk on it and it all gives way underneath you, you break your neck and wreck the roof, who will the custie want compo from.....you! Just cos the custie says it is safe, doesn't mean it is.
Why should you lose custies, if you explain what could happen? They would understand if you explain it correctly to them.
If they don't, then they are not worth having