There's one thing that doesn't add up: why would such a privacy conscious man use his real name on a project he thought might be illegal? If he was so serious about his privacy, he would not have used his real name in public.
It's entirely plausible that Satoshi thought using that name, on his little project, would be enough. There is sometimes a lab mentality among people whose work has mostly been hidden away, they would never expect it to touch every corner of the world economy. It was just an experiment early on, and by the time it was obvious it would be more than that, his name was already attached.
I suspect the Silk Road connection is what popularized the idea of a public ledger somehow providing privacy.
You don't have to have something to hide to want privacy.