Because it lets me be a warrior that has both a Combat Role and a Out of Combat Role and does them well.
The Fighter is very Dependent on their Physical stats. 5e is very weak on letting your physical stats push out of combat unless you use DEXTERITY KING OF THE ABILITY SCORES. And even then Dexterity is limited and Fighter only get Acrobatics as a DEX class skill. Only only STR skill. No Con skills. And Fighters get no tools by default.
It;'s a huge ask to get a DM to make your noble knight fighter work before level 8 by asking for 7and a half houserules.
This to me is the whole problem.
How the Gehenna is making a noble, knight, miltilia captain, chieftian or gladiator with High Str, High Cha, and Decent Con a bad choice in Dungeons and Dragons?
Many fighters based on the fluff of the fighter as an elite warrior would come out of the military or nobility and many would have decent or high mental stats.
But there are very few core ways to bring their mental stats to the battlefield unlike real life.
What the Hades Mearls and Crawford?
I mean the noble and knight NPCs in the MM have 15 CHA.