Right decision for the wrong reason

There were 3 persons undergoing treatment at a lunatic asylum. The doctor in charge was pretty confident that they were progressing well and would soon be cured. So after a month's treatment he called all the 3 of them in front of a large and deep empty swimming pool. He asked the 1st person to jump in the pool, who gladly did so & broke his hand. The next person also jumped, and he broke his leg. Now the doctor asked the 3rd person to jump.
"No doctor, not me".

The doctor was elated, that at least this fellow was cured.
"Good, go and fetch your things, you can go home now",the doctor told him.
"But by the way, can you tell me why you did not jump".
"I am not mad, doctor, I do not know swimming"

Don't we also sometimes do the same thing? - take a right decision for the wrong reasons, think about it!