Because all cultures and ethnics have different ways of approching a problem.
Explanation:
For example if you are from a 3rd world country then you may be considered "woke" because you have expierenced hardship. So when you see a problem, you work as hard as you can. But if you are from a country like the USA, you may look at a problem and try to fix it but in the end, give up. That is why most of the great companies in America are comprised of immigrants.
Because proper Table manners are respectful especially in a public place. And its The proper thing to do. someone’s that being respectful, makes things less awkward And more comfortable