Term, that is not what you said.
You said lax rules for night flight and made no mention of engines.
The vast majority of the fatal crashes at night in the USA EMS business are IIMC events and most of them are the result of bad decision making.
With a fleet of over 800 EMS Helicopters operating 24/7 we have far more exposure to the risk of flying at night than do you in the UK.
Yet we see two very clear examples of the fallacy of your argument with the Glasgow Crash and the one that evoked this thread.
Despite your "Rules", you still lose aircraft, crews, and passengers during night flight.