Why is there no "Dex" race; ie, a race which only gains dex on level up?

Int has deep elf, which can only gain int. Strength has an incredible list of four: Ghoul, Hill Orc(RIP), Oni and Troll. There's no race in the game which only gains dex.

Demigods don't gain random stats, so you can choose dexterity at every choice and consider that to be a 'dex' race.

There's no inherent reason why there needs to be a dexterity focused race, but it is empty design space that could be used. Do you think dex race would be too strong, too weak? Or just depends on what the rest of the race's mechanics are? Would it push them too heavily towards ranged weapons and dodging? Is that a problem, or is "archer who dodges stuff" a fun archetype that we should encourage?