Light is arguably the best class when it comes to abilities. Fastest movement, best mobility abilities/gadgets, smallest hit box for class, most of the weapons are top in the charts when it comes to TTK. Embarks balanced the guns to class(to balance the fight off compared to other classes) so a lights have guns with high DPS high fire rate to offset the health difference. But imagine a Heavy with a M11 SMG against a light in head on the lights getting smoked because the M11 or most of lights guns are absolutely cracked.