Even ignoring crime, a curfew probably helps the health care and firefighting sectors significantly. I can easily imagine my friend group using a blackout as an excuse for a drunken bonfire.
So long as there is enough space to safely have a bonfire (no burning down the neighbor's house or starting a forest fire), and nobody gets so drunk they need medical care there is nothing wrong with a drunken bonfire. Or you can put away the alcohol and have a kid friendly bonfire - they are just as much fun.
Of course many drunken bonfires end up needing health care and/or firefighting. However they need not. How do you fix your friends?
Yes, with proper planning drunken bonfires are fine, I've enjoyed several.
One hastily put together without the benefits of electricity is less likely to be properly planned. Hundreds if not thousands of groups doing the same thing ensures a certain number are going to cause problems. And with emergency services already stressed, banning risky behavior seems fair.
All bonfires have risks, so banning them during a complete blackout really doesn’t seem unreasonable. If you do have an accident, don’t expect an ambulance to come.
Why wouldn't an ambulance come? My experience (this is US) is I expect the local emergency phone numbers to work and the ambulance to come.
A bonfire is what I want people doing. they have fun and with some care is safe enough. They can enjoy the power outage instead of complain about how awful life is.
My local experience with blackouts is cell towers become unusable after 4-6 hours; if the outage started in the middle of the night, sometimes things work a little longer, until everyone wakes up. Emergency calls have priority and can attach to any network, so maybe they would work, but not if all the cell towers are totally offline.
Certainly some towers may have onsite generators with fuel set to automatically run, but not the ones around me, and I've had two multiday outages this winter.
Landlines should work, but I don't know if Chile has many of them. I know they're rare here in Washington State. Wired internet is a maybe, depending on provider choices.
As long as someone never ever needs to be inconvinented even in a situation were it could make sense to just not do anything which is not necessary for a day or two...
If we had a system, were you could register yourself and the society would be allowed to not help you, that would be great. But no we have a medical code (which funny enough is not enough to let woman die when they have a difficult/livethreatening pregnancy...)