
I see what you're saying, and I like the way you put it. The way I initially read it was more that he was literally defined by his driving. He had no past. He had no name. He had no personality. He drove for the movies, as a getaway driver, he was a budding race car driver, and a mechanic. And that's really all he ever was until he met Irene. He was, in all ways, a device.
I think this is true, and I think Irene is just a venue through which he can play out fantasies of the noble protector archetype. It's a role he wants to play -- there's little authentic about it. Something about him driving off at the end even feels bizarrely asexual, like he was never in it for the intimacy anyway; I would argue he actually remains a device throughout the entire movie, and Irene does little or nothing to actually change this.
I also think the autism similarities are a byproduct of Refn's other intentions in the Driver characterization. It's a fun bit of speculation but just ends up being distracting.






