There is also the argument that the universe exists because there are many more ways to exist than there are not to exist and so existence is more probable.

ECONOMIST: The question of existence

Just as there exists a very fine line between brilliance and insanity, there also exists a fine line between passion and many negative traits such as narrow-mindedness, narcissism, fanaticism, delusion, and even paranoia.

FORBES: Passion: Leadership Asset or Liability?

There are many theories about why this condition exists.

BBC: News

In short, there exists no national plan for restoring the nation's many artistic and historic riches.

WSJ: The Fashion Set Saves Italy

There are many theories as to why the value premium exists.

FORBES: Value Stocks and Dividends

The truth is that, despite many advances, much of medicine still exists in a gray zone where there is not one right answer.

WSJ: Hartzband and Groopman on the Rise of the Medical Expertocracy

Since there are many activities that are essential to modern society that are inherently inefficient, government exists to provide services that make those activities happen.

FORBES: Colleges And Universities Should Operate More Like Businesses