The logic doesn’t really hold up. They would not have been in the USA long enough for a 10am start to be ‘day’ on their body clocks. Wake up time in the hotel would be around 6:30 am, which, back home is roughly midnight. It was rare on US trips to ever get to sleep before dawn. So, the reality is that the crew will be starting the flight having little to no sleep, and that won’t change during the trip. As the pilots will be the same, and they don’t have a proper crew rest either, it’s a flight that I’d be avoiding … as a passenger or crew.