Pasta is absolutely right, why should Megan assimiliate and lose all of her cultural identity? This is 21st century. There are many similarities in people in the US to the UK but there are many differences too and it's really, really easy to appear wrong or off just because of those small differences, and it's frightening, isolating and lonely when you sense you've done something not quite right but you're not at all sure what it is... I imagine with the scrutiny she's under Meghan has that in spades.
Bednobs is also right, the Brits do love a good dose of understated jealousy about what others have- you so often hear 'well I wouldn't pay that even if I had the money- must have more money than sense..' etc etc etc- well yes you probably would tbh, at least most people would because you do spend what you you have disposable. I always fly economy if I book anything because I'm tight, my partner flies 1st or Business because flying affects him badly and he likes to lie down and sleep if he can but the last time I booked flights I automatically looked at 1st before economy, before I slapped myself upside the head and realised what I was doing, so to the super wealthy like Amal Cloony the money sped on this was nothing...