I don't know if I agree. There are import and export restrictions and most countries require you declare on a customs form the contents of packages shipped outside of the country. When you travel, you're expected to bring anything you take with you back, and declare anything you bring in that you didn't take out.

In addition, from a more realistic/practical scenario, most physical possessions are not useful outside of your legal jurisdiction in that you cannot easily use them yourself.

And there's a significant issue with digital assets (as with money, in fact), that large companies shift them over international borders in order to evade the law, that simply doesn't exist in the physical possession space.

For example, I believe it's been accused that some tech companies shift user data overseas explicitly so that they can then deny fulfilling legal warrants on the grounds the data is not stored in the same country, or any number of tax evasion schemes designed to store and transfer money through countries with favorable tax laws.