You can not judge one's stupidity base on their human memory space or capability. At the same time, you can not judge one's intelligence base on their human memory space and capability. There are many ways to judge intelligence and stupidity.
It is the role of a billionaire/ millionaire to work on the talent acquisition and talent appreciation on this issue. When one is found stupid in an organization or a group of individuals, these billionaire/ millionaire will use their power to relocate these stupid to any group or any organization which is having the same intelligence level like him/ her. If your intelligence is an average, do not think about marrying extremely rich because these people are only interested in a woman with good conversation/ communication skill from many domain knowledge. Seducing or SEX might be interesting to them while it will not last long. You will be ended up a divorce eventually when these RICH and POWERFUL people meet the liked minded individual such as Prince Alwaleed (https://en.wikipedia.org/wiki/Al-Waleed_bin_Talal) divorced a few times (Look at Princess Ameera (https://en.wikipedia.org/wiki/Ameera_al-Taweel)! She is the most beautiful woman I have ever seen in my life. Are you more sexy and beautiful than her? Show me!!), Prince Harry and many others. I know about an American couple, they do not have SEX for more than 40 years while they are still happily living together as husband and wife with children. They enjoy their conversation and the things which they have done together such as cooking, gardening, skiing, swimming, playing tennis and many others.
This is the photo of Princess Ameera, former wife of Prince Alwaleed.
This is the photo of Meghan Markle, current girl friend/ partner of Prince Harry/ Henry.
These are the photos of Deborah Priya Henry/ Deborah Henry Priya, former girl friend/ partner of Dato' Justin Leong Ming Loong.