Do you want to give your insurance company an excuse not to pay you if your equipment starts a fire, albeit a small chance ?
I agree in principal but disagree on the last bit. It isn't a small chance that the insurance would be invalidated it is a very real possibility. Waste money on something else like having the electrical utility replace your house supply line back to the nearest pole with audiophile approved wire. It won't make any difference either but after spending thousands doing it I can almost guarantee that you'll think there is a big improvement.