You might want to take note of the word 'afterwards' there. His car was most certainly not fine
The state of his car after the crash is irrelevant.
The question is: was it human error or could it have been avoided?
Vettel's crash was down to misjudgement and error. I don't think he was being reckless. He tried to brake late (perhaps he had a little brain fade as well) and his car began to fishtail out of control. During this time, Button happened to be right in front of Vettel's (out of control car) and he collected Button.
Now, Webber's crash was similar in that he misjudged the timing of his braking (perhaps due to a little brain fade) and as a result he collected the Lotus in front of him.
I remember Hamilton running into the back of Kimi, in Canada, in the pitlane on a red light...he was not punished and neither should he be.
You cannot punish a driver for error/brain-fade. You can however, punish a driver if he does something he shouldnt, on purpose (eg. what MS did to Barrichello in the GP before Spa).
Vettel's crash into Button.
Webber's crash into Heikki.
Hamilton's crash into Kimi.
Barrichello's crash into Alonso.
None of the above were on purpose and therefore should carry any penalty.