This is a bad idea for so many plain reasons that I'm not even sure how the author could propose this as an approach. What they're doing is functionally no different form saying "I don't know my password", it just includes a lot of extra steps and some fantasy that the border control guard will be interested in reading a blog post about encryption. Needless to say, don't do this, if you don't want to share your data, it's easier to not take it, back it up and/or transfer it later.
The smart move is to use an unsupervised burner iPhone for your travel with a different Apple ID, sign out of iCloud while transiting, don’t have email and text resident on it, and carry a Chromebook if need be.
Use a Yubikey with pin for access to the online accounts.
I advise all of our executives to do this, because you don’t know what’s hiding in your phone that some prick border dude will take issue with. That group text where your buddy talks about how Luigi was right could be interpreted as a threat.
