Was just frowning when I read "For example, the three largest stocks accounted for less than 10% of returns in most years since 2009, and often just in the very

Was just frowning when I read "For example, the three largest stocks accounted for less than 10% of returns in most years since 2009, and often just in the very low single digits." and saw that it was above 10% in 4 of 12 months in the table. What the hell, who is this text for?