Here's a nice double-bind: messing with your brain to become smarter when nobody knows exactly what the outcome will be, is a bad idea; yet, to understand this you need to not be dumb in the first place.
There might, however, be a dark side to the story. There is
a good reason we were designed to have finite sensitive
periods. Takao Hensch, a Harvard neuroscientist, has
written that plasticity takes a lot of energy: It’s
exhausting to keep all your neural circuits in a dynamic
state. Restricting it may protect the brain.