> What exactly is on their smart device they are afraid CBP might be interested in? Why did they not protect their device before? Why now? Are there occurrences of FAANG employees having their devices taken during border crossings? For what purpose?

Do you wonder why Canada has been issuing travel warnings for people travelling to the US? Or why they've been treating the US as a hostile power given that the current admin has threatened to invade Canada and make it the 51st state? All of which are leading to a massive drop in tourism to the US?