Never flew first class. Above my pay grade.
But I did once stay at the Inter-Continental in Hong Kong (on someone else's expense)
Luxury is nice, but ....
A staff came to my room and brought chocolates to welcome me to the room and he bowed as he gave me the chocolates.
First and last time anyone every bowed at me. I get treated like crap mostly in real life.
First class 5 star hotel/restaurant folks love this kind of treatment, to be made to feel like they are royalty.
I find it all ridiculous.
And it's not healthy for your ego to spiral out of control and you start thinking you're more important than everyone else.