It always is vintly. But why did Verstappen get a 5 second penalty, and Vettel a 10 second penalty ??l
Because they were differing offences. Driving dangerously is twice as bad as going off the circuit and gaining time. Seems to be fair to me.
The stewards determine whether or not the rules have been broken, CW has no say in that; what he can do is to refer a case to the stewards. In this case it seems that CW did not ask the stewards to look into it.