Wisdom sometimes comes with age. Old fools are common and abundant. A toddler, a child, a teenager often has more wisdom than an old person.

 Wisdom sometimes comes with age. Old fools are common and abundant.
A toddler, a child, a teenager, a youthful person often has more common sense and wisdom than an old person.

Some of us have or did have textbook smarts and lack common sense throughout life.