Um. As someone who lives in Austria (one of the countries marked as 'unlikely to give you food'): We actually do invite people to eat with us. It's just that 'oh you happen to be here, have some food' is not something we do. When we want to eat with you, we actually ask first.
So generalizing this as 'how do you not share food with your guests' overdramatizes this graphic because we have dinner invitations, we have invitations to cook together. I used to do that with friends when I was younger too.
I think social media blows this way out of proportion.