As I stated, some folks think that an Airstream is well worth the money simply because of their design, features and uniqueness. If you add to this the status factor it becomes a bargain.
If you do not feel that way, oh well. You are not part of the Airstream demographic. Neither they nor the people who buy them care about the snarky opinions of others.
They proudly make what they make, either you feel it is worth the price or you can go buy something else.
I do not care for Airstreams but I do not like golf either; yet I certainly do not complain about folks who are willing to pay a ridiculous fee just to play on a prestigious area golf course.
While I prefer to waste my money on my own unique hobbies, I certainly am not going to begrudge others their pleasure.
Be safe.