Profile bars?

Most people strongly recommend the use of profile bars. A minority, however, say they're useless unless you're an elite cyclist (aerodynamic considerations indeed become more important with higher speed) and argue people only mount them on their bike as a statement - "I'm a triathlete".

In the quest to tune my bike into a more efficient, triathlon-like machine, I've therefore tried to adapt profile bars. I finally gave up with the Oval A710 previously installed, as they were too uncomfortable for my arms. I recently replaced them with the Profile Jammer GT, apparently more suitable for long rides. They're higher and feel better in the arms. But I don't really have a good feeling with them: it feels like my lower back is supporting most of my upper body weight (when my forearms should help) and I can't drive as much power from my legs.
Profile jammer
I have a feeling it's because I have relatively long legs and the bike frame is fitted for that. Thus, the handle bars are a relatively a long reach, and the profile bars worsen that effect. The good point if this hypothesis holds is: I'm low enough on the bike and don't really need profile bars. That would make my bike lighter. So profile bars or not? I may try to take pictures of my riding posture to take a decision.

Ultra aerodynamic decision to make.