Lets look at the All-American and Deathclaws *who currently have 15DT*
Against a deathclaw using AP ammo it would deal 22.8dmg a hit. (The AP arounds negate the 15DT and you multiply the dmg by 0.95)
The AER14 using regular ammo would deal 23. (36-13DT) as regular cells have -2DT
So the unique laser rifle is SUPERIOR damage wise using its regular ammunition, and without even accounting for having at twice the critical rate which would really adds up.[or counting laser commando] With this Machine the damage is easily comparable when you account for the faster rate of fire of the AER14 and critically hitting twice as often.
So basically you ignore some of the advantages of the weapon to support you argument, yeah thats really valid.