You are trying to justify the existence of an industry that doesn't need to exist. The great unwashed don't need their 'thrill' rides and the people living underneath the routes certainly don't need the noise and worry about accidents.
The Grand Canyon certainly doesn't need the noise and air pollution - something like 400 flights a day in what is supposed to be a beautiful and tranquil place - just to service a bunch of lazy people who can't be arsed to go and walk down into the canyon to admire its majesty. The next step is the awful Escalade that planners keep pushing for.
When making money can only be achieved by taking and putting other people at increased risk with no tangible upside other than a thrill, maybe that money making just shouldn't happen.
The people underneath those "thrill" rides at night in Vegas are mostly inside a casino where they cannot hear anything over the bells and whistles of the poker machines, the rest are half drunk walking to their next party and assuredly couldn't care about the noise overhead,...if they can even hear the choppers over the traffic.
,....but then all of Vegas need not exist, or Disneyworld, or movie theaters, or anything we do in between slaving away for that all mightly dollar!
As for the Grand Canyon, I don't think they do tours at night, so no little animals are losing any sleep.
Just out of curiosity, does going on a ride at night in a twin, suddenly inspire "the great unwashed" to wash themselves?
