I grew up in So Cal (Simi Valley) in the 1960s and 1970s. Back then, the "neighborhood moms" would help you out if you rashed your face on the pavement. My wife and I left there in 1985 and moved up north to the "wild west", we we still are today.
Today, my "neighborhood" is about 12-15 miles north to south and about 6 miles wide. Much of the area has very few services. In the southern portion, there are no stores, gas stations or retail businesses of any kind. Law enforcement response was measured in hours or even days until recent years.
We are basically on our own down here. Many live behind tall fences and locked gates, because the tweakers will rob you blind given half a chance. BTW, I have some "experience" and don't play that game.
In the rainy season, the roads flood every year and we are cut off from anything. In the summer, fires are a constant danger. This is why I would like to establish a radio network for emergencies.
There are several established repeaters that easily cover this area, but the owners are all "mine, mine, mine!" centric.
It is pretty sad, actually.