ADias has got it right. Airbags save lives, period. Think about smacking your head into the windshield or steering-wheel during a crash...it isnt pretty, trust me I've seen it.
Having said that I also would prefer it if Porsche eliminated weight for their cars. Less weight = better driving experience. But I dont think Porsche is going to give their cars a diet. From their prospective if you want a drivers car you buy a GT3...and most of their other customers want the creature comforts. So are they going to make the 997 Turbo light...definately not, but they should definately consider making another version that is (say 997 Turbo S and for sure the GT2)
Maybe you dont like if thats the case (and trust me I prefer light cars like the old Carrera RS) but you also have to face reality.