A few questions:
Are you going to spend your life within a few feet of the entrance so you can dive in at the first hint of danger, like Mr. Groundhog?
How do you run an indoor movie, pool, other luxury items, without electricity?
Oh yes a generator.
And how do you run a generator without fuel? If you can get fuel as needed, it is not such a catastrophic event that you need to hide in a hole.
So much for that.
The shelters have enough food, fuel, etc to last one year.
“Cyberbunker”, the clandestine web hosting company, has enough fuel to run their datacenter for 10 years if authorities shut power. An entire level of the bunker is fuel tanks. They host any website and nobody has been able to break in to serve a court order. Even SWAT attempted to get in with no luck.