There are so many things wrong with that statement I'm not sure where to start.
Is a man wearing a Bat-suit silly? Absolutely. But it does serve a FUNCTION, which is to make him more intimidating.
The two new movies have moved so far from the source material? Begins was no farther from the source material than Batman 89 or Batman Forever. Every film has made changes but every one of them has also kept the core of the characters intact. You're getting hung up on superficial details.
When you watched TAS did Batman's grappler have a bat motif on it? No. Did Keaton's? No. Do the batarangs? Yes. And so do Bale's. Bats have a lot of points so it works, especially when the batarangs are shuriken, as they are in Nolan's films.
Why should a car have bat-fins? What purpose does that serve? It doesn't add a damn thing to the myth of Batman, it doesn't add any functionality. It's just there to "look cool." It's flashy and superficial, and those are not qualities that I associate with Batman.
Batman is the king of pragmatists, and you know it.