Is it? Let's compare a 3rd level Fighter (Battle Master, 16 Dex, wielding 2 short swords, TWF Fighting Style) with a 3rd level Barbarian (Frenzy, 16 Str, wielding a greatsword)
Round 1 (B): The Barbarian rages and takes a single swing. 2d6+5 damage
Round 2 (B): The Barbarian takes one swing as...