That's like saying "Oh, you don't need flux vents on a Hammerhead because it's got 250 base dissipation and a pair of heavy maulers is only 240 flux/s". Yeah, if you cherry-pick the very cheapest-to-fire energy guns, and then ignore the ballistics and the Sunder's 200 flux/s shield upkeep, sure.
So if we buffed Sunder dissipation to 800, and I gave an example of a Plasma Cannon Sunder with no vents, would you also call it a cherry-picked, cehapest-to-fire example? Just because the Vent number is 0? Again, it's bizarre how much you people try to make high flux dissipation a bad thing.
HIL/Gravitons Sunder build doesn't exist because it's cheap(because it's not, 550 flux is not even possible to reach for the likes of Enforcer, Manticore or Hammerhead) but because it works well - HIL against armor, Gravitons against shields and it's all beams so you get 200 extra range from Advanced Optics.
Meanwhile, your coutner-example of two Heavy Mauler Hammerhead
is a cherry-picked, cheapest-to-fire build that no one uses because it's completely helpless against shields and Maulers don't exactly have impressive DPS in the first place. And it's not even possible to make it work because there are no small ballistics with 1000 range.
Like, you can take the default "balanced" Hammerhead, strip off Blast Doors and Expanded Missile Racks, and crank the ship up to 20/20 capacitors with 3OP left over.
The default "balanced" Hammerhead with two Heavy Mortars and two Railguns for combined flux use of 660? When flux dissipation on a Hammerhead maxes out at 450 with 20 vents? That's not even a real build, that's some relic of a bygone era.