What is the brain power concept?
Brain power refers to how much power a human brain can handle at any time and at any level of cognitive function. There is no such thing as the maximum level of brain power. For example, one would not be able to handle the power of a 100-watt light bulb for 100,000 hours.
This would be equivalent to a brain of 20 people, or a brain of one person. We could also say that a human can only handle 100 watts of power. We don't even consider that a computer or a TV is 100 watts.
Now you can have an idea about the energy levels a person can handle. It is possible to get into a room that has enough room for all of them in one, but a very small room. Then we will see how they do in one room with a large number of people.
For example, let's take the famous photo of the "Man in the Moon" at the Lunar Landing Site, taken by Alan Shepard. You can see that there are many, many different rooms in the building, and they have different rooms, but they all have the same space. Now you can have another person in there, if you can fit them in a room with space.