Who came for you? You want to go to the US (or any other country) and therefore you align with their rules.
Nobody forces you to go there, and especially play secret agent. If you go, you know that what you have can be searched so have nothing, or have something that is not controversial.
The same applies to all the countries in the world.
What does this has to do with the topic of trying to be clever with the border police with some tricks to conceal information? (as opposed to not having it in the first place)
It has to do with your argument of "if you don't like it, don't go there". Also, you specifically asked "who came for you" so it's direct answer to your question.
Well, considering that the US considers some political beliefs and journalism crimes, "don't go there with incriminating devices" implies restrictions on free speech and journalistic freedom. Also, privacy is not only for hiding crimes. Equating privacy with criminality is a great way to get undermine people's rights further. It's perfectly ok to think that some random TSA agent shouldn't be seeing my family photos etc. when I have done nothing wrong.
If you believe these rights are not important, that's your own opinion. But I think it's perfectly valid to criticize attacks on human rights.
Exactly. If I plan to visit a country where green shirts are illegal, I'm not going to pack my green shirts into a secret hidden luggage compartment, smug in the knowledge that I'm so clever. I'm going to either not visit or not bring my green shirts.
Same for this. Whether we like it or not, some stuff on your phone are now considered contraband at the US border. Either don't bring them or don't visit.
Bluntly: fuck that. I'm many generations deep in this country, and when I travel to visit other places, I have the right to return here to the home where I was born. No part of our Constitution says I have to kiss law enforcement's butt to be permitted to come back to my house. I understand that they're trying to do their job, but the government also needs to understand that I'm not interested in participating in dragnet searches.
I feel no moral or legal obligation to let them search through all my stuff just because of their policies, which don't seem at all compliant with our highest laws and ideals.