1) absolute autonomy—being free to do as they please
No such thing. It is only an ideal. The real world never works like that. Would you say the US, then, was founded on 'atheist' or 'occult' ideologies? Remember, this is the ideal strived for. Even then, with freedom also comes responsibility...
2) the lack of ultimate accountability—there are no eternal consequences for doing as they please.
You could say there are eternal consequences. A foolish mistake that would end life earlier would have eternal consequences. It would prevent you from living those extra minutes, hours, days, years, etc. and you would never gain that opportunity again (life).
Hmm... do you believe in hell? You've already stated you don't believe in Satan as a literal being... so what exactly is your theological position? How about you tell us your position first, instead of pissing on atheists?