FIA orders you to park your car in the pit lane at the end of the race.
I guess we should strip Nico of the title for failing to comply with those orders.
Ignoring the fact that the FIA isn't the one that contracts Nico Rosberg, or pays him a salary.
Yes, if Nico broke a rule the FIA instated he should get a penalty. Not sure why you think the only penalty they can give is stripping him of the title when speeding in the pitlane, for instance, is a 1000 USD fine.