Agreed. This small of a fine comes off as a cost of doing business for a company as large as Facebook.
There was a stink about a car manufacturer and seat belts (I think) a few years back. They decided the cost of a few settlements for dead people was less than the cost of fixing the problem.
This is now, has been, and (unless we eat the rich) always will be the way it is.
Making it be 5% of profit and not revenue would make it hurt even less.