Not really. The 'leader' of the Netherlands for all political purposes is the Prime Minister, not the king.
You are mixing up leader with head of state. The latter can be a completely meaningless role fulfilled by a paid actor such as in our case, whereas the nominal leader may look like a paid actor, but tends to have actual power and some form of accountability.
One usually has a prime minister as the head of cabinet and the executive branch via the rest of the ministers. What argument could one make to say a prime minister is not a leader, since the actual argument is missing from your comment?
You are mixing up leader with head of state. The latter can be a completely meaningless role fulfilled by a paid actor such as in our case, whereas the nominal leader may look like a paid actor, but tends to have actual power and some form of accountability.