The only reason I can think of that makes any sort of sense is that it was a classic case of "we must do something, this is something, therefore we must do it." Especially after Trafalgar, Napoleon simply couldn't think of any other way of striking at Britain. The possibility of invasion had gone, and Britain had no allies or footholds left on the continent, so economic warfare was all that was left.
I suppose.
Seems like a case of autocratic ego getting in the way of good judgment, though. "Nevermind whether or not it is in my best interests, I want to do it."
And, as is often the case with tyrants, when it became clear it wasn't working he responded by doubling down rather than admit he was wrong. Hence you got nonsense like the North Sea coast as far as Lubeck being annexed to France (because German customs inspectors were ignoring the smuggling) and his own brother being deposed as king of Holland for likewise turning a blind eye (poor Louis - he thought he was an actual king of Holland, with a duty to put Holland's interests first, and not merely his brother's puppet). The end result of this style of thinking of course was the march on Moscow.
Appropriate. But from the standpoint of someone who finds incompetence even in the other side annoying, maddeningly stupid.
If Napoleon had kept it as a matter of France , it might have made sense, or even been enforceable - to the extent "turning commerce over to smugglers" isn't counted against it, of course. But when it starts meaning all of Europe must be made to fight for his wars and his reasons, and essentially what your saying is doing so as much as conscripting young men into the army or any other act of intrusion...
Character is destiny. And Napoleon
was an autocrat.