I have repeated it 5 times in a variety of different tones. I still don't know all the law that governs a US citizen, and they would still likely apply to me if I was in America :P.

You've missed the point. If someone puts a bear trap just outside my door it is easy to avoid - just hop over it. That doesn't change the fact that there is a bear trap outside my door. The whole point here is there are so many laws on the books that just talking to a federal agent is potentially incriminating, which is what is being part of what is being acknowledged by pleading the 5th immediately and getting a lawyer.

Also, if I don't know about the bear trap, there is a very high chance I will get caught in it even though it is easy to avoid.