We play different style games.
You create a fairly standard 1st level fighter. You put your best score in STR, then next in CON, third DEX, the next probably WIS for a decent Perception. You get +6 to hit with your greatsword with 2d6+4 damage each time you hit. You have a pretty good amount of HP, a normal AC, and a passable Perception score. You are the best you are going to be at doing damage as a 1st level fighter.
I want to play something different. I don't feel the need to "be the best at doing damage" to still feel like I am making an interesting character. I put my best stat in CHA, then STR, then CON, then DEX. I am equipped the same as you are. I get +5 to hit with my greatsword for 2d6+3 damage. I have 1 less HP than you, I have one less AC than you. But what I do have is a Persuasion score of +6 versus your +0 or -1 (depending on where you put your 8).
The GM has us trotting down the road and we get separated. Both of us are attacked by bandits. You, using your superior combat ability pull out your greatsword, dash into combat, and lay the bandits low with a quick series of kills. I use my persuasion to try to get them to let me pass by peacefully, which makes one of the bandits sit this fight out, getting into an argument with his buddies about letting me go. I pull out my greatsword, dash into combat, and lay the bandits (minus one member) low in roughly the same time and with the same damage as you did.
Different paths....same end result. Your character isn't "better" than mine, its just different. If you can't understand this, then you must play a style of game that ONLY is interested in what your character sheet says about combat and doesn't allow for different paths through the story. There is nothing wrong with this style of game, but its not the only style of game and certainly not the style that I enjoy.
NOTE: My 1e Al-Quadim character is literally a fighter with CHA as his highest stat, followed by STR, CON, then DEX. He does just fine in battle and just fine outside of it.