Are left-handed people superior or inferior? (Debate)?

Many studies claim left handed people are overachievers, can handle large amounts of stimuli, and are overrepresented among the highly gifted. An equal number of studies claim they make less money, are more likely to have mental disabilities, and have more emotional problems. Famous (confirmed) left handers include Oprah Winfrey, Ross Perot, Paul Mccartney, Eminem, Chester Bennington, Martina McBride, Clint Eastwood, Mark Wahlberg, Ben Stiller, Bruce Willis, Angelina Jolie, Nicole Kidman, Julia Roberts, Ridley Scott, James Cameron, Chris Nolan, Trey Parker, Matt Groening, Vince Gilligan, Stephen Hillenburg, Jerry Seinfeld, Tim Tebow, Steve Young, Bill Russell, Isaiah Thomas, Tony Stewart, Ayrton Senna, Terry LaBonte, Dario Franchitti, Valentino Rossi, Sebastien Loeb, David Robinson, John Mcenroe, Bubba Watson, Phil Mickelson, Aroldis Chapman, Babe Ruth, Barry Bonds, Randy Johnson, and hundreds upon hundreds of other Major League players, Bruce Jenner, Harry Truman, Gerald Ford, Ronald Reagan, George Hw Bush, Bill Clinton, Barack Obama, John McCain, Lindsey Graham, Rand Paul, George Pataki, David Cameron, Benjamin Netanyahu, Benjamin Franklin, Leonardo DaVinci, Benjamin Franklin, Ehud, Prince William, and Shigeru Miyamoto.