Throughout history, people did not consider being left-handed a good thing. In fact, some lefties were forced to start writing with their right hand. For example, one of my parent’s family friends is ambidextrous because the school he went to forced him to write with his right hand even though he was left-handed. Even today, some cultures view being left-handed as an unfortunate thing. In Europe, people used to call homosexuals left-handed. This transformed the word’s definition into something offensive. In Latin, the word sinistra, sinistrae (feminine) means left handed. Sinistra has the same root as sinister, which means inauspicious. In Ancient Rome, left-handed people were considered to be unreliable. However, surprisingly, left-handed soldiers in the Roman Legion were considered to be special because they could fight with different methods.
This is definitely still true today. When I serve in tennis, my ball normally ends up going around 40mph and deep into the service box. I also hit fast, flat returns with my forehand because my left-hand is strong and dominant. This helps me win most matches because it’s easier for me to aim at their backhand while they’re lost over which hand my forehand is.