A lot of people would agree with you, and a lot would disagree. Capacitors with no charge pull more current than the amp alone would, BUT not when they maintain a charge, like if the car is driven everyday. It's obvious in theory and in practice that having a stiffening capacitor will prevent minor electrical issues. I'm not gonna put the time for that into my girl's car just to fix headlights dimming. In my own car, caps immediately improved my bass response too. Better yet, they're cheap.