system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Expensive boutiques in airports. Are they really profitable? Who buys things there?

I recently had to fly trough Heathrow a number of times and I've found myself in the middle of dozen of crazy-expensive shops. A Rolex one, a Gucci one, jewelry shops etc... 

Who buys things there, honestly? Is there really someone with time to waste that goes: "I'm gonna buy a 10,000 Rolex while I wait for a plane?". Who buys a Louis Vuitton luggage set while connecting? Who buys a designer brand 1,000$ suit before boarding the plane? I mean..., for sure somebody like that exists. But are there enough of these people to pay what I expect to be a huge rent there?

It doesn't really make any sense to me...
gpt
In a busy international airport, they may be trying to attract Duty-Free business. That $10,000 Rolex may cost $11,000 in the U.S. due to sales tax or $12,000 in Europe due to VAT. So they may buy it at the airport to save on the tax/duty.