The analogies are beside the point. Logging in to a system which you don't have permission to access just is illegal in many countries, whether you think that it ought to be or not.
I don't see how those two statements are consistent with each other. The first says you're trying to judge whether or not the law is reasonable, and the second says that you're not trying to comment on what the law ought to be.
You did not enter the house you did not explore. You turned the key, the knob, and made sure the door would open a little.
Not something I would recommend, especially since the key had the address and the owner name and address attached to it.
But not as bad as someone entering the home and looking around.