What is hilarious is that you obviously lack any knowledge or understanding of factors influencing elite athletic performance. They are competing at the absolu

What is hilarious is that you obviously lack any knowledge or understanding of factors influencing elite athletic performance. They are competing at the absolute edge of capability and 1/100s of seconds or millimeters of position make a difference between winning and middle-of-the-pack performance. Both body and mind must be in absolute top tune. It is NOT about "handling 26°C". It is about the established fact that top athletes can improve their performance by optimizing their environment around the competition, which includes their sleeping conditions. Tour De France teams travel with their own motor homes and don't sleep in the assigned hotels, and when they were forced to do so (race sponsorship requirements, etc.), would bring in their own bedding. There are many other examples. It is NOT about "Americans doing American things".