ah the elephant in the room... (somewhat). This is seemingly the universal consensus, and I have no interest in nor desire to delve into what is fair and what is not fair but based on people's accounts, the most important factors in receiving your quota bag are what you purchase (purchase history), your spend, the seniority of your SA, and the store's stocks.
My impression pre-covid was that it was much harder to get a quota bag in asian countries compared to Europe and USA but I think that has somewhat changed.
Now, I have seen on various social media platforms giving 'advice' on how to 'score' a B or K without any purchase history. People may disagree with me but 9 out of 10 times, these accounts did not turn out to be true. Many of my friends love Hermes and frequently shop in many stores across the world but I have so far never seen anyone who was offered a quota bag by just walking into the store with the exception of Paris of course.