I can pretty much assure you that not all lefties are arrogant, stuck up individuals. Being a lefty is something special because most people in the world are born right handed.
I, being left handed, am certainly not stuck up. I live to learn from others and help other people out of kindness, that makes me very happy - perhaps you've been exposed to many lefties that are very arrogant?
Please realise that although left handed people may have various advantages over right handed people, they also have downsides such as the hardship of writing and then getting smudges everywhere, writing in a ring binder or a folder, having to find a pair of scissors etc. etc. (I could on). Everything from writing to cutting is so much easier for right handed people because most of the world is right handed, it's become a norm to shape all things around the majority!