I‘ve gone through a ton of comments below and see a lot of contradicting evidence to your thoughtful suggestion. Also my girlfriend and I are both from north Europe and I notice a similar difference. Maybe the difference is mostly
> she had been brought up to feel extreme insecurity
This reminds me of a quote from Buffett from about 40 years ago. He said something along the lines of "when women are raised, they hear and see a million reasons why they cannot do things whereas men see and hear a million reasons why they can do things". If I would be convinced by the world that I am not good, then sure I would treat guests amazingly well. If I would be convinced by the world I‘m amazing, then why bother treating guests well? They can say it if they need anything.
I‘m happy to hear counterarguments if you have them
> she had been brought up to feel extreme insecurity
This reminds me of a quote from Buffett from about 40 years ago. He said something along the lines of "when women are raised, they hear and see a million reasons why they cannot do things whereas men see and hear a million reasons why they can do things". If I would be convinced by the world that I am not good, then sure I would treat guests amazingly well. If I would be convinced by the world I‘m amazing, then why bother treating guests well? They can say it if they need anything.
I‘m happy to hear counterarguments if you have them