Trying to convince some exponents of the "single engine is best" theory is pointless. Even though they have little or nil experience of multi engined aircraft, (and probably little prospect of flying them which may explain their stance), they think they know better than folk with a far broader experience .... and better than the regulatory authorities.
Some obviously fail to realise, or choose to ignore, the fact that all pilots now flying twin engined helicopters began their careers flying singles.