Technically I use both hands to do different things. You really cannot rule out the idea that one hand is worthless to someone when they both have it to utilize. However, for me, when it comes to writing I tend to use my right hand all the time. I don't usually do particular well when it comes to writing with my left hand. However, most times when I have to do something my left hand is being put into more use for me. So, again it really depends on what I'm doing that depends on which hand I use in life.