>> yet this is a fact, because otherwise hardly anyone would be in prison.

The explanation that some people just ignore the laws and think they can get away with it is too simple, isn't it?

>> Humans are not perfect reasoning machines

Neider are they "stupid saints". They sometimes just take a huge risk for whatever reason. And sometimes this risk involves getting jailed, because society consider some kind of risks as undesired and make you pay a high price for taking them.