How is that happening of middle-aged and older.

I read an article in the newspaper that a number of shoplifting of middle-aged and older is more than such young people these days.
According to the article, it's not that the middle-aged people don't have money to buy things.
Some say they want to feel a thrill.
It is calls to mind that sometimes I come across those who become out of control in a train or on the street.
Although I'm also middle-aged, I can't understand their mind.
My image of middle-aged is that physical power reduce, but mind get mature.
What do you think about it ?