This seems like a shallow take on a complex subject.<p>It seems overly simplistic to unilaterally claim that our brains decline past age 30.<p>Sure, under some metrics. Under others they improve [1].<p>There's a reason why we don't put 20 year olds in charge of our nuclear arsenal, for example - and it has nothing to do with the ability to remember a sequence of 7 numbers instead of 6.<p>[1]<a href="https://www.health.harvard.edu/mind-and-mood/why-you-should-thank-your-aging-brain" rel="nofollow">https://www.health.harvard.edu/mind-and-mood/why-you-should-...</a>