Its a genuine comment that stronger rules which disallow single engine (and by association non fully IFR equipped) night "VFR" commercial and EMS flights would have and still can prevent accidents in the USA.
Ah but are the single engined helos less well equipped for night "VFR" simply because there is no market for them (in the UK), since the rules forbid it?
In other words, if single engine IFR and night commercial VFR were permitted, then the market would have a better demand for such and singles would therefore thus become better equipped.